Physics Final

A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter's acceleration? a. 0.22 m/s^2 b. 0.69 m/s^2 c. 3.2 m/s^2 d. 4.6 m/s^2

0.22 m/s^2

What temperature has the same numerical value on both the Fahrenheit and the Celsius scales? a. -72.0 b. 40.0 c. 0 d. -40.0

d. -40.0

A sled traveling at a speed of 3.0 m/s slows to a stop 4.0 m from the point where its passenger rolled off. What is the magnitude of the horizontal net force the slows the 110 N sled? a. 130 N b. 34 N c. 37 N d. 13 N

d. 13 N

What is the temperature of a system in thermal equilibrium with another system made up of ice and water at 1 atm of pressure? a. 0 K b. 0 degrees F c. 100 degrees C d. 273 K

d. 273 K

An anti on a picnic table travels 3.0x10^1 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the magnitude of the ant's displacement relative to its original position? a. 70 cm b. 57cm c. 52cm d. 29 cm

d. 29 cm

In general, Fnet equals a. Ff b. Fg c. Fn d. EF (greek letter E)

d. EF

How does a liquid differ from a gas? a. a liquid has a definite shape, unlike gas b. a liquid has both definite shape and definite volume, whereas a gas has neither c. a liquid has definite shape, whereas a gas has a definite volume d. a liquid has a definite volume, unlike a gas

d. a liquid has a definite volume, unlike gas

The trough of the sine curve used to represent a sound wave corresponds to a. the amplitude b. a compression c. the wavelength d. a rarefaction

d. a rarefaction

Which are simultaneous equal but opposite forces resulting from the interaction of two objects? a. net external forces b. field forces c. gravitational forces d. action-reaction pairs

d. action-reaction pairs

Which of the following can be a centripetal force? a. friction b. gravity c. tension d. all of the above

d. all of the above

The angle between the string of a pendulum at its equilibrium position and its maximum displacement is the pendulum's a. frequency b. vibration c. period d. amplitude

d. amplitude

A baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time? a. midway on the way up b. the instant it leaves the catcher's hand c. the instant before it arrives in the catcher's mitt d. at the top of its path

d. at the top of its path

If a is acceleration (m/s^2), delta v is change in velocity (m/s), delta x is change in position (m), and delta t is the time interval (s) which equation is not dimensionally correct? a. a=v^2/change in x b. change in velocity= a/change in t c. change in time= change in x/velocity d. change in t^2= 2 times the change in x/a

d. change in t^2= 2 times the change in x/a

The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through what process? a. convection b. vaporization c. radiation d. conduction

d. conduction

Of the following materials, sound waves travel fastest through a. helium at 0 degrees C b. air at 0 degrees C c. air at 100 degrees C d. copper at 0 degrees C

d. copper at 0 degrees C

What quantity measures the work done by a machine relative to the work done on a machine? a. torque b. leverage c. mechanical advantage d. efficiency

d. efficiency

When there is no air resistance, objects of different masses dropped from rest a. fall with equal accelerations and with different displacements b. fall with different accelerations and with equal displacements c. fall with different accelerations and with different displacements d. fall with equal accelerations and with equal displacements

d. fall with equal accelerations and with equal displacements

What causes a moving object to change direction? a. acceleration b. velocity c. inertia d. force

d. force

For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time? a. revolution b. period c. amplitude d. frequency

d. frequency

To which of the following is high temperature related? a. large volume b. low particle kinetic energy c. zero net energy transfer d. high particle kinetic energy

d. high particle kinetic energy

A train moves down the track toward an observer. The sound from the train, as heard by the observer is ________ the sound heard by a passenger on the train. a. a different timbre than b. lower in pitch than c. the same as d. higher in pitch than

d. higher in pitch than

A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line? a. centripetal acceleration b. centripetal force c. centrifugal force d. inertia

d. inertia

When an object is moving with uniform circular motion, the centripetal acceleration of the object a. is circular b. is perpendicular c. is zero d. is directed toward the center of motion

d. is directed toward the center of motion

Which of the following is a direct cause of a substance's temperature increase? a. the number of atoms and molecules in a substance changes b. the volume of the substance decreases c. energy is removed from the particles of the substance d. kinetic energy is added to the particles of the substance

d. kinetic energy is added to the particles of the substance

What two dimensions, in addition to mass, are commonly used by physicists to derive additional measurements? a. length and width b. velocity and time c. area and mass d. length and time

d. length and time

A lack of precision in scientific measurements typically arises from a. human error b. too many significant figures c. lack of calibration d. limitations of the measuring instrument

d. limitations of the measuring instrument

A measure of the quantity of matter is a. density b. weight c. force d. mass

d. mass

A calorimeter is used to determine the specific heat capacity of a test metal. If the specific heat capacity of water is known, what quantities must be measured? a. metal mass, water mass, heat added or removed from water and metal b. metal volume, water volume, initial and final temperatures of metal and water c. metal mass, water mass, final temperature of metal and water d. metal mass, water mass, initial and final temperatures of metal and water

d. metal mass, water mass, initial and final temperatures of metal and water

A create is released on a frictionless plank inclined at an angle with respect to the horizontal. Which of the following relationships is true? a. Fy=Fg b. Fx=0 c.Fy=Fx d. none of the above

d. none of the above

For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion? a. frequency b. amplitude c. revolution d. period

d. period

Which of the following is the motion of objects moving in two dimensions under the influence of gravity? a. horizontal velocity b. directrix c. vertical velocity d. projectile motion

d. projectile motion

Energy transferred as heat occurs between two bodies in thermal contact when they differ in which of the following properties? a. density b. mass c. specific heat d. temperature

d. temperature

A simple pendulum swings in simple harmonic motion. At maximum displacement, a. the velocity reaches a maximum b. the restoring force reaches zero c. the acceleration reaches zero d. the acceleration reaches a maximum

d. the acceleration reaches a maximum

If two small beakers of water, one at 70 degrees C and one at 80 degrees C, are emptied into a large beaker, what is the temperature of the water? a. the final temperature is greater than 80 degrees C b. The final temperature is less than 70 degrees C c. The water temperature will fluctuate d. the final temperature is between 70 degrees C and 80 degrees C

d. the final temperature is between 70 degrees C and 80 degrees C

As an object falls towards Earth a. the object does not exert a force on Earth b. the object exerts a downward force on Earth c. Newton's third law doesn't apply d. the upward acceleration of Earth is negligible because of its large mass

d. the upward acceleration of Earth is negligible because of its large mass

How are the frequency and period related in simple harmonic motion? a. both measure the number of cycles per unit of time b. their sum is constant c. they are directly related d. they are inversely related

d. they are inversely related

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is a. a pulse b. longitudinal c. electromagnetic d. transverse

d. transverse

Newton's third law of motion involves the interaction of a. one object and one force b. one object and two forces c. two objects and one force d. two objects and two forces

d. two objects and two forces

A mass attached to a spring vibrates back and forth. At the equilibrium position, the a. acceleration reaches a maximum b. net force reaches a maximum c. velocity reaches zero d. velocity reaches a maximum

d. velocity reaches a maximum

A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is a. greater than the normal force times the coefficient of static friction b. equal to the normal force times the coefficient of static friction c. the normal force times the coefficient of kinetic friction d. zero

d. zero

Which expression has the same dimensions as an expression yielding a value for acceleration (m/s^2)? a. (v)^2/x b. v/(t)^2 c.(v)^2/t d. t/v

a. (v)^2/x

An airplane with a mass of 1.20x10^4 kg tows a glider with a mass of 0.60x10^4 kg. If the airplane propellers provide a new forward thrust of 3.60x10^4 N, what is the acceleration of the glider? a. 2.00 m/s^2 b. 3.00m/s^2 c. 6.00m/s^2 d. 9.80m/s^2

a. 2.00 m/s^2

Two perpendicular forces, one of 45.0 N directed upward and the other of 60.0 N directed to the right, act simultaneously on an object with a mass of 35.0kg. What is the magnitude of the resultant acceleration? a. 2.14 m/s^2 b. 3.00 m/s^2 c. 5.25 m/s^2 d. 1.41 m/s^2

a. 2.14 m/s^2

A substance registers a temperature change from 20 degrees C to 40 degrees C. To what incremental temperature change does this correspond? a. 20 K b. 313 K c. 36 K d. 40 K

a. 20 K

The radius of Earth is 6370000m. Express this measurement in km in scientific notation with the correct number of significant digits. a. 6.37x10^4 km b. 6.37x10^3 km c. 637x10^3 km d. 6.37x10^6 km

a. 6.37x10^4 km

A sled weighing 1.0x10^2 N is held in place on a frictionless 20.0 degree slope by a rope attached to a stake at the top. the rope is parallel to the slop. What is the normal force? a. 94 N b. 47 N c. 37 N d. 34 N

a. 94 N

Which of the following statements does not describe force? a. Force causes objects at rest to remain stationary b. Force causes objects to start moving c. Force causes objects to stop moving d. Force causes objects to change direction

a. Force causes objects at rest to remain stationary

Which of the following is not a widely used temperature scale? a. Joule b. Celsius c. Fahrenheit d. Kelvin

a. Joule

Which of the following statements is not correct? a. A fluid has a definite shape b. Molecules of a fluid are free to move past each other c. A fluid flows d. A fluid changes its shape easily

a. a fluid has a definite shape

Which of the following exhibits parabolic motion? a. a stone thrown into a lake b. a space shuttle orbiting Earth c. a leaf falling from a tree d. a train moving along a flat track

a. a stone thrown into a lake

Which of the following is the region of a sound wave in which the density and pressure are greater than normal? a. compression b. amplitude c. rarefaction d. wavelength

a. compression

In a coordinate system, a vector is oriented at an angle with respect to the x-axis. The x component of the vector equals the vector's magnitude multiplied by which trigonometric function? a. cos b. cot c. sin d. tan

a. cos

The greek letter delta indicates a(n) a. difference or change b. inverse proportion c. direct proportion d. sum or total

a. difference or change

How is energy transferred as heat always directed? a. from an object at high temperature to an object at low temperature b. from an object at low temperature to an object at high temperature c. from an object with higher mass to object of lower mass d. from an object at low kinetic energy to an object at high kinetic energy

a. from an object at high temperature to an object at low temperature

The degree to which an object attracts other objects is measured by the object's a. gravitational mass b. inertial mass c. gravitational field strength d. weight

a. gravitational mass

What happens to the internal energy of an ideal gas when it is heat from 0 degrees C to 4 degrees C? a. it increases b. it decreases c. it remains constant d. it is impossible to determine

a. it increases

One end of a taut rope is fixed to a post. What type of wave is produced if the free end is quickly raised and lowered one time? a. pulse wave b. longitudinal wave c. periodic wave d. sine wave

a. pulse wave

A piece of chalk is dropped by a teacher walking at a speed of 1.5m/s. From the teacher's perspective the chalk appears to fall a. straight down b. straight down and backward c. straight down and forward d. straight backward

a. straight down

Which of the following is proportional to the kinetic energy of atoms and molecules? a. temperature b. thermal equilibrium c. potential energy d. elastic energy

a. temperature

Which of the following is true during a phase change? a. temperature remains constant b. temperature increases c. temperature decreases d. there is no transfer of energy as heat

a. temperature remains constant

Which statement about acceleration of an object is correct? a. the acceleration of an object is directly proportional to the net external force action on the object and inversely proportional to the mass of the object b. the acceleration of an object is directly proportional to the net external force action on the object and directly proportional to the mass of the object c. the acceleration of an object is inversely proportional to the net external force acting on the object and inversely proportional to the mass of the object d. The acceleration of an object is inversely proportional the net external force action on the object and directly proportional to the mass of the object

a. the acceleration of an object is directly proportional to the net external force action on the object and inversely proportional to the mass of the object

Which of the following features of a given pendulum changes when the pendulum is moved from Earth's surface to the moon? a. the equilibrium position b. the restoring force c. the mass d. the length

a. the equilibrium position

If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true? a. the ice is cooler than the table b. the table and the ice are at thermal equilibrium c. Energy is being transferred form the ice to the table d. the ice is no longer 0 degree C

a. the ice is cooler than the table

A buoyant force acts in the opposite direction of gravity. Therefore, which of the following is true of an object completely submerged in water? a. the net force on the object is smaller than the weight of the object b. the object appears to weigh more than it does in air c. the net force on the object is equal to the weight of the object d. the net force on the object is larger than the weight of the object

a. the net force on the object is smaller than the weight of the object

If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do? a. use a wrench with a longer handle b. tie a rope to the end of the stench and pull on the rope c. use a wrench wit ha shorter handle d. you should exert a force on the wrench closer to the bolt

a. use a wrench with a longer handle

Which of the following is an example of a vector quantity? a. velocity b. temperature c. volume d. mass

a. velocity

A waitperson carrying a tray with a platter on it tips the tray at an angle of 12 degrees below the horizontal . If the gravitational force on the platter is 5.0 N, what is the magnitude of the force parallel to the tray that tens to cause the platter to slide down the tray? a. 0.42 N b. 1.0 N c. 4.9 N d. 5.0 N

b. 1.0 N

An iron bar is used to lift a slab of cement. The force applied to lift the slab is 4.0 x 10^2 N. If the slab weighs 6400 N, what is the mechanical advantage of the bar? a. 1.6 b. 16 c. 6000 d. 6.3%

b. 16

A child rides a bicycle in a circular path with a radius of 2.0m. The tangential speed of the bicycle is 2.0m/s . The combined mass of the bicycle and the child is 43kg. What is the magnitude of the bicycle's centripetal acceleration? a. 1.0m/s^2 b. 2.0m/s^2 c. 4.0m/s^2 d. 8.0m/s^2

b. 2.0 m/s^2

A heavy bank-vault door is opened by the application of a force 3.0 x 10^2 directed perpendicular to the plane of the door at a distance of 0.80 m from the hingers. What is the torque? a. 120 N x m b. 240 N x m c. 300 N x m d. 360 N x m

b. 240 N x m

The wavelength of the fundamental frequency of a vibrating string length of L is a. L b. 2L c. 1/2 L d. 4L

b. 2L

A girl pushes a box that has a mass of 450 N up an incline. If the girl exerts a force of 150 N along the incline, what is the mechanical advantage of the incline? a. 0.33 b. 3.0 c. 300 d. 33%

b. 3.0

A substance registers a temperature change from 20 degrees C to 40 degrees C. To what incremental temperature change does this correspond? a. 40 degrees F b. 36 degrees F c. 20 degrees F d. 313 degrees F

b. 36 F

Calculate the following and express the answer in scientific notation with the correct number of significant figures: 21.4+15+17.17+4.003 a. 5.75x10^1 b. 5.8x10^1 c. 5.7573x10^1 d. 5.757x10^1

b. 5.8x10^1

A jet moving at 500.0 km/h due east is in a region where the wind is moving at 120.0 km/h in a direction 30.00 degrees north of east. What is the speed of the aircraft relative to the ground? a. 620.2 km/h b. 606.9 km/h c. 588.7 km/h d. 511.3 km/h

b. 606.9 km/h

A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30.0 degrees above the horizontal. If the horizontal component of the face on the suitcase is 60.6 N, what is the force exerted on the handle? a. 53.0 N b. 70.0 N c. 65.2 N d. 95.6 N

b. 70.0 N

If there is no temperature difference between a substance and its surroundings, what has occurred on a microscopic level? a. Energy has been transferred from lower-energy particles to higher-energy particles b. Energy has been transferred form higher-energy particles to lower-energy particles c. No energy has been transferred between the substance and its surroundings d. Heat has been flowing back and forth

b. Energy has been transferred from higher-energy particles to lower-energy particles

Which of the following statements is true according to Pascal's Principle? a. Pressure in a fluid is greatest at the center of the fluid b. Pressure in a fluid is the same throughout the fluid c. Pressure in a fluid is greatest at the walls of the container holding the fluid d. Pressure in a fluid is greatest at the top of the fluid

b. Pressure in a fluid is the same throughout the fluid

Which of the following statements about completely submerged objects resting on the ocean bottom is correct? a. The displaced volume of fluid is greater than the volume of the object b. The apparent weight of the object depends on the object's density c. the weight of the object and the buoyant force are equal and opposite d. The buoyant force acting on the object is equal to the object's weight

b. The apparent weight of the object depends on the object's density

What is the path of a projectile (in absence of friction)? a. a wavy line b. a parabola c. a hyperbola d. projectiles do not follow a predictable path

b. a parabola

Which of the following is an example of projectile motion? a. a jet lifting off a runway b. a thrown baseball c. an aluminum can dropped straight down into the recycling bin d. a space shuttle being launched

b. a thrown baseball

A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the a. velocity reach zero b. acceleration reach a maximum c. acceleration reach zero d. velocity reach a maximum

b. acceleration reach a maximum

Two mechanical waves can occupy the same space at the same time because waves a. do no cause interference patterns b. are displacements of matter c. are matter d. cannot pass through one another

b. are displacements of matter

Tides are caused by a. differences in the gravitational force of the sun at different points on Earth b. differences in the gravitational force of the moon at different points on Earth c. differences in Earth's gravitational field strength at different points on Earth's surface d. fluctuations in the gravitational attraction between Earth and the moon

b. differences in the gravitational force of the moon at different points on Earth

Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional to a. time b. displacement c. a spring constant d. mass

b. displacement

Where should a force be applied on a lever arm to produce the most torque? a. closest to the axis of rotation b. farthest from the axis of rotation c. in the middle of the lever arm d. It doesn't matter where the force is applied

b. farthest from the axis of rotation

Objects that are falling toward Earth in free fall move a. slower and slower b. faster and faster c. slower then faster d. at a constant velocity

b. faster and faster

A child rides a bicycle in a circular path with a radius of 2.0m. The tangential speed of the bicycle is 2.0m/s . The combined mass of the bicycle and the child is 43kg. What kind of force provides the centripetal force on the bicycle? a. gravitational force b.friction c. air resistance d. normal force

b. friction

Which of the following terms describes a transfer of energy? a. internal energy b. heat c. kinetic energy d. temperature

b. heat

Which of the following is a fluid? a. iron b. helium c. ice d. gold

b. helium

The centripetal force on an object in circular motion is a. perpendicular to the plane of the object's motion b. in the plane of the object's motion and perpendicular to the tangential speed c. in the plane of the object's motion and in the same direction as the tangential speed. d. in the plane of the object's motion and in the direction opposite the tangential speed

b. in the plane of the object's motion and perpendicular to the tangential speed

Which of the following is the tendency of an object to maintain its state of motion? a. acceleration b. inertia c. force d. velocity

b. inertia

Which of the following is not an example of units for expressing pressure? a. N/m^2 b. kg/m^2 c. atm d. Pa

b. kg/m^2

What three properties of a substance affect the amount of energy transferred as heat to or from the substance? a. column, temperature change, specific heat capacity b. mass, temperature change, specific heat capacity c. density, temperature change, specific heat capacity d. mass, temperature change, latent heat

b. mass temperature change, specific heat capacity

If a pendulum is adjusted so that its frequency changes from 10 Hz to 20 Hz, its period will from from n seconds to a. n/4 seconds b. n/2 seconds c. 2n seconds d. 4n seconds

b. n/2 seconds

Which of the following best describes the relationship between two systems in thermal equilibrium? a. the volumes are equal b. no net energy is exchanged c. the masses are equal d. the velocity is zero

b. no net energy is exchanged

The highness or lowness of a sound is perceived as a. compression b. pitch c. wavelength d. ultrasound

b. pitch

Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity a. vector, scalar, scalar b. scalar, scalar, vector c. scalar, vector, scalar d. vector, scalar, vector

b. scalar, scalar, vector

Which of the following most affects the wavelength of a mechanical wave moving through a medium? a. the energy carried by the wave b. the nature of the medium c. the height of the crest d. the amplitude

b. the nature of the medium

According to Newton's second law, when the same force is applied to two objects of different masses, a. the object with greater mass will experience a great acceleration , and the object with less mass will experience an even greater acceleration b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration

b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration

If you are on a train, how will the pitch of the train's whistle sound to you as the train moves? a. the pitch will become steadily higher b. the pitch will not change c. the pitch will become higher, then become lower d. the pitch will become steadily lower

b. the pitch will not change

Which of the following properties is not a characteristic of an ideal fluid? a. non viscous b. turbulent flow c. incompressible d. laminar flow

b. turbulent flow

The motion of a ball on an inclined plane is described by the equation: change in X =1/2a (change in t)^2. Which of the following quantities must have a value of zero? a. x (initial) b. v(initial) c. x (final) d. t(final)

b. v(initial)

The magnitude of the gravitational force action on an object is a. frictional force b. weight c. inertia d. mass

b. weight

A single force acts on an object. The components of this force act along the +x-axis and the -y-axis. The single force that will bring the object into equilibrium has components that act along the a. +x-axis and +y-axis b. +x-axis and -y-axis c. -x-axis and +y-axis d. -x-axis and -y-axis

c. -x-axis and +y-axis

What is the temperature of a system in thermal equilibrium with another system made up of water and steam at 1 atm of pressure? a. 0 degrees C b. 273 K c. 100 degrees C d. 0 K

c. 100 degrees C

A pendulum swings through a total of 28 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration? a. 7.0 degrees b. 56 degrees c. 14 degrees d. 28 degrees

c. 14 degrees

Energy is transferred as heat between two objects, one with temperature of 5 degrees C and the with a temperature of 20 degrees C. If the other object are to have the same amount of energy transferred between them, what might their temperatures be? a. 15 degrees C and 25 degrees C b. 10 degrees C and 15 degrees C c. 17 degrees C and 32 degrees C d. 80 degrees C and 90 degrees C

c. 17 degrees C and 32 degrees C

A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N. Assuming the entire lower surface of the bed is in contact with the floor, what is the pressure the bed exerts on the floor a. 260 Pa b. 270 Pa c. 280 Pa d. 250 Pa

c. 280 Pa

If the torque required to loosen a nut on a wheel has a magnitude of 40.0 N x m and the force exerted by a mechanic is 133 N, how far from the nut must the mechanic apply the force a. 1.20 m b. 15.0 cm c. 30.1 cm d. 60.2 cm

c. 30.1 cm

For the winter, a duck flies 10.0 m/s south against a gust of wind with a speed of 2.5m/s. What is the resultant velocity of the duck? a. 12.5 m/s south b. -12.5m/s south c. 7.5 m/s south d. -7.5 m/s south

c. 7.5 m/s south

A sculpture is suspended in equilibrium by two cables, one from a wall and the other from the ceiling of a museum gallery. Cable 1 applies a horizontal force to the right of the sculpture and that tension Tt1. Cable 2 applies a force upward and to the left at an angle of 37.0 degrees to the negative x-axis and has a tension Ft2. The gravitational force on the sculpture is 5.00x10^3 N. What is Ft2? a. 4440N b. 6640N c. 8310N d. 3340N

c. 8310N

A child rides a bicycle in a circular path with a radius of 2.0m. The tangential speed of the bicycle is 2.0m/s . The combined mass of the bicycle and the child is 43kg. What is the magnitude of the centripetal force on the bicycle? a. 4.0 N b. 43 N c. 86 N d. 3.6 kN

c. 86 N

Which of the following statements is always true? a. Pressure always increases when force increases or the area acted on increases b. Pressure always increases when force decreases or the area acted on increases c. Pressure always increases when force increases or the area acted on decreases d. Pressure always increases when force decreases or the area acted on decreases

c. Pressure always increases when force increases or the area acted on decreases

Which of the following is not an example of approximate simple harmonic motion? a. a piano wire that has been struck b. a child swinging on a swing c. a ball bouncing on the floor d. a car's radio antenna waving back and forth

c. a ball bouncing on the floor

Which of the following does not exhibit parabolic motion? a. a frog jumping from land into water b. a basketball thrown to a hoop c. a flat piece of paper released from a window d. a baseball thrown from home plate

c. a flat piece of paper released from a window

Which of the following is not an example of projectile motion? a. a volleyball served over a net b. a baseball hit by a bat c. a hot-air balloon drifting toward Earth d. a long jumper in action

c. a hot-air balloon drifting toward Earth

What kind of simple machine are you using if you pry a nail form a board with the back of a hammer? a. a wedge b. a pulley c. a lever d. a screw

c. a lever

Which of the following is the equation for acceleration? a. a=vt b. a= (V initial-V final)/(T initial-T final) c. a=v/t d. a=t/v

c. a=v/t

If a nonzero net force is acting on an object, then the object is definitely a. at rest b. moving with a constant velocity c. being accelerated d. losing mass

c. being accelerated

Which of the following forces arises from direct physical contact between two objects? a. gravitational force b. fundamental force c. contact force d. field force

c. contact force

Which of the following is the cause of an acceleration? a. speed b. inertia c. force d. velocity

c. force

A free-body diagram represents all of the following except a. the object b. forces as vectors c. forces exerted by the object d. forces exerted on the object

c. forces exerted by the object

When calculating the gravitational force between two extended bodies, you should measure the distance a. from the closest points on each body b. from the most distant points on each body c. from the center of each body d. from the center of one body to the closest point on the other body

c. from the center of each body

The centripetal force on an object in circular motion is a. in the same direction as the tangential speed b. in the same direction opposite the tangential speed c. in the same direction as the centripetal acceleration d. in the direction opposite of the centripetal acceleration

c. in the same direction as the centripetal acceleration

What are the energies associated with atomic motion called? a. potential energy b. bond energy c. internal energy d. kinetic energy

c. internal energy

When an object is moving with uniform circular motion, the object's tangential speed a. is circular. b. is perpendicular to the plane of motion c. is constant. d. is directed toward the center of motion

c. is constant

A newton is equivalent to which of the following quantities? a. kg b. kg x m/s c. kg x m/s^2 d. kg x (m/s)^2

c. kg x m/s^2

The SI base unit used to measure mass is the a. second b. liter c. kilogram d. meter

c. kilogram

The length of a force vector represents the a. cause of the force b. the direction of the force c. magnitude of the force d. type of force

c. magnitude of the force

What quantity measures the output force of machine relative to the input force? a. torque b. leverage c. mechanical advantage d. efficiency

c. mechanical advantage

The symbol mm represents a a. megameter b. manometer c. millimeter d. micrometer

c. millimeter

A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to a. stand still b. move west at a speed that is less than the bus's speed c. move west at a speed that is equal to the bus's speed d. move east at a speed that is equal to the bus's speed

c. move west at a speed that is equal to the bus's speed

For incompressible fluids, density changes little with changes in a. depth b. free-fall acceleration c. pressure d. temperature

c. pressure

Which of the following is not an example of laminar flow? a. water flowing evenly from a slightly opened faucet b. a river moving slowly in a straight line c. smoke twisting as it moves upward from a fire d. smoke rising upward in a smooth column through air

c. smoke twisting as it moves upward from a fire

Which of the following statements about floating objects is correct? a. The object's density is equal to the density of the fluid on which it floats b. The displaced volume of fluid is greater than the volume of the object c. The buoyant force equals the object's weight d. The object's density is greater than the density of the fluid on which it floats

c. the buoyant force equals the object's weight

Energy transfer as heat between two objects depends on which of the following? a. the difference in composition of the two objects b. the difference in volume of the two objects c. the difference in temperature of the two objects d. the difference in mass of the two objects

c. the difference in temperature of the two objects

A hammer drives nail into a piece of wood. Identify an action-reaction pair in this situation. a. the nail exerts a force on the hammer; the hammer exerts a force on the wood b. the hammer exerts a force on the nail; the wood exerts a force on the nail c. the hammer exerts a force on the nail; the nail exerts a force on the hammer d. the hammer exerts a force on the nail; the hammer exerts a force on the wood

c. the hammer exerts a force on the nail; the nail exerts a force on the hammer

What does m represent in the equation for the speed of an object in circular orbit? a. the mass of the sun b. the mass of Earth c. the mass of the central object d. the mass of the orbiting object

c. the mass of the central object

As the temperature of a substance increases, its volume tends to increase due to a. thermal equilibrium b. thermal contraction c. thermal expansion d. thermal energy

c. thermal expansion

The statement by Newton that for every action there is an equal but opposite reaction is which of his laws of motion? a. first b. second c. third d. fourth

c. third

A change in the gravitational force action on an object will affect the object's a. mass b. coefficient of static friction c. weight d. inertia

c. weight