PHYSICS 1210 FINAL EXAM
A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed in the same direction, it would have hit the ground in A) 0.5 s B) more than 0.5 s C) less than 0.5 s
A) 0.5 s
A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball that is initially at rest on a frictionless surface. The speed of the putty thereafter is A) 1/6 m/s B) 1/4 m/s C) 1/5 m/s D) impossible to solve with the information given
A) 1/6 m/s
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about A) 10 m/s B) 15 m/s C) 5 m/s D) depends on its initial speed
A) 10 m/s
A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is A) 10 times as much B) zero C) the same as the force on the 1-kg book D) one-tenth as much
A) 10 times as much
A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 second later? A) 100 m B) 30 m C) 98 m D) 490 m E) none of these
A) 100 m
A bow is drawn so that is has 40 J of potential energy. When fired, the arrow will ideally have a kinetic energy that is A) 40 J B) more than 40 J C) less than 40 J D) impossible to predict without additional information
A) 40 J
What is the force of gravity on a 500-newton woman standing on the Earth's surface? A) 500 N B) 250 N C) 50 N D) 5000 N E) none of these
A) 500 N
A 10-N falling object encounters 4 N of air resistance. The net force on the object is A) 6 N B) 0 N C) 4 N D) 10 N E) none of these
A) 6 N
If a car accelerates from rest at 2 meters per second per second, its speed 3 seconds later will be about A) 6 m/s B) 2 m/s C) 4 m/s D) 3 m/s
A) 6 m/s
A skydiver of mass 100 kg experiences air resistance of 500 N, and an acceleration of A) about 0.5 g B) more than 0.5 g C) about 0.2 g D) about 0.4 g E) about 0.3 g
A) about 0.5 g
A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed? A) about 20 m/s B) about 10 m/s C) about 25 m/s D) about 5 m/s E) none of these
A) about 20 m/s
If the mass of an object does not change, a constant net force on the object produces constant A) acceleration B) velocity C) both of these D) neither of these
A) acceleration
No force due to Earth's gravity is acting on the astronauts inside the orbiting space shuttle. This statement is A) always false B) sometimes true while in orbit C) always true while in orbit
A) always false
Nuclei of atoms that make up a newborn baby were made in A) ancient stars B) the mother's womb C) the food the mother eats before giving birth D) the Earth E) none of these
A) ancient stars
Inside a freely falling runaway elevator, your A) apparent weight is zero B) acceleration is zero C) gravitational interaction with the Earth is zero D) all of these E) none of these
A) apparent weight is zero
If the Earth's mass decreased to one-half its original mass with no change in radius, then your weight would A) decrease to one half your original weight B) decrease to one quarter your original weight C) stay the same D) none of these
A) decrease to one half your original weight
A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration A) decreases B) increases C) remains unchanged regardless of air resistance
A) decreases
Whirl a rock at the end of a strong and it follows a circular path. If the string breaks, the tendency of A) follow a straight-line path B) continue to follow a circular path C) increase its speed D) revolve in a smaller circle
A) follow a straight-line path
The newton is a unit of A) force B) mass C) density D) inertia
A) force
An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration A) halves B) stays the same C) quadruples D) doubles E) none of these
A) halves
As we grow older, we have the greatest difficulty hearing frequencies that are A) high B) low C) mid-range
A) high
In each second of fall, the distance of freely falling object will fall is A) increasing B) about 5 m C) about 10 m D) the same, but not 5 m or 10 m E) none of these
A) increasing
An object may have potential energy because of its A) location B) speed C) acceleration D) momentum E) none of these
A) location
Twelve seconds after starting from rest, an object falling freely will have a speed of A) more than 100 m/s B) 100 m/s C) 10 m/s D) 50 m/s
A) more than 100 m/s
Which of the following are electrically neutral? A) neutron B) electron C) ion D) proton E) none of these
A) neutron
Which of the following is not a vector quantity? A) speed B) velocity C) acceleration D) none are vector quantities E) all are vector quantities
A) speed
Your weight is A) the gravitational attraction force between you and the Earth. B) equal to your mass C) a property of mechanical equilibrium D) all of these
A) the gravitational attraction force between you and the Earth
Which is most responsible for the ocean tides? A) the moon B) the sun C) both contribute equally
A) the moon
Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are A) the same age B) newer C) actually older
A) the same age
A 1000-kg car and a 2000-kg car are hoisted the same distance. Raising the more massive car requires A) twice as much work B) less work C) more than four times as much work D) as much work E) four times as much work
A) twice as much work
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is A) zero B) equal to the product of its mass times its weight C) equal to its weight D) equal to its weight divided by its mass
A) zero
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is A) more than 10 N B) 10 N C) less than 10 N
B) 10 N
A machine puts out 100 Watts of power for every 1000 Watts put into it. The efficiency of the machine is A) 50% B) 10% C) 110% D) 90% E) none of these
B) 10%
An airplane that flies at 100 km/h in a 100 km/h hurricane crosswind has a ground speed of A) 0 km/h B) 141 km/h C) 100 km/h D) 200 km/h
B) 141 km/h
A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration is meters per second per second when taking off? A) 1 B) 2 C) 0.25 D) 4 E) none of these
B) 2
A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when hits the tree. What is the deceleration in meters per second per second of the car? A) 110 B) 220 C) 880 D) 800 E) cant be solved without the mass of the car
B) 220
A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? A) 12 m/s B) 3 m/s C) 48 m/s D) 4 m/s E) none of these
B) 3 m/s
A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second A) between 0 and 9.8 B) 9.8 C) zero D) greater than 9.8
B) 9.8
Disregarding air resistance, objects fall with constant A) velocity B) acceleration C) distances each successive second D) speed
B) acceleration
Hang from a pair of gym rings and the upward support forces of the rings will always A) each be equal to your weight B) add up to equal your weight C) each be half of your weight
B) add up to equal your weight
When properly used, a hydraulic press, like a wheel and axle, is capable of multiplying force input. A) always false B) always true C) sometimes true D) sometimes false
B) always true
Inside a freely falling elevator, there would be no A) gravitational force on you B) apparent weight for you C) both of these D) none of these
B) apparent weight for you
A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is A) zero B) doubled C) unchanged D) quadrupled
B) doubled
During an eclipse of the sun the high ocean tides on Earth are A) not particularly different B) extra high C) extra low
B) extra high
Suppose the moon had twice as much mass as it now does and still orbited the Earth at the same distance. In that case, the ocean bulges on Earth would be A) smaller B) larger C) unequal in size D) not significantly different E) none of these
B) larger
A "weightless" astronaut in an orbiting shuttle is A) shielded from the Earth's gravitational field B) like the shuttle, pulled by Earth's gravitation C) beyond the pull of gravity D) pulled only by gravitation to the shuttle which cancels outs the Earth's gravitational pull E) none of these
B) like the shuttle, pulled by Earth's gravitation
A force is a vector quantity because it has both A) mass and acceleration B) magnitude and direction C) action and reaction counterparts
B) magnitude and direction
A kilogram is a measure of an object's A) size B) mass C) weight D) force
B) mass
A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its horizontal component of velocity A) decreases B) remains unchanged C) increases
B) remains unchanged
A projectile is fired vertically from the surface of the Earth at 8 km/s. The projectile will A) follow an uncertain path B) rise and fall back to Earth's surface C) escape from the Earth D) go into circular orbit about the Earth
B) rise and fall back to Earth's surface
Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr? A) the 30 km/hr car B) the 60 km/hr car C) both have the same kinetic energy D) more information is needed about the distance traveled
B) the 60 km/hr car
After rolling half way down an incline, a marble's kinetic energy is A) less than its potential energy B) the same as its potential energy C) greater than its potential energy D) impossible to determine
B) the same as its potential energy
An asteroid exerts 360-N gravitational force on a nearby spacecraft. This force is directed A) away from the asteroid B) toward the asteroid C) toward the sun
B) toward the asteroid
How many different elements are in a water molecule? A) none B) two C) one D) four E) three
B) two
If you find that twice as much work is needed to perform a task but it takes twice as much time, the amount of power required is A) twice as much B) unchanged C) sixteen times as much D) four times as much
B) unchanged
While an object near the Earth's surface is in free fall, its A) mass increases B) velocity increases C) acceleration increases D) mass decreases
B) velocity increases
When a falling object has reached its terminal velocity, its acceleration is A) constant B) zero C) g
B) zero
The power required to exert 1 N force, over a distance of 1 m in 1 second is A) 2 W B) 3 W C) 1 W D) 1/3 W E) none of these
C) 1 W
A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is A) 30 km/h B) 40 km/h C) 20 km/h D) 15 km/h
C) 20 km/h
A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is A) 200 N B) 800 N C) 400 N D) none of these
C) 400 N
A stone is thrown horizontally from the top of a cliff. One second after it has left your hand, its vertical distance below the top of the cliff is A) 10 m B) 15 m C) 5 m
C) 5 m
Which of the following is not a compound? A) salt B) ammonia C) air D) water E) all are compounds
C) air
A hydraulic press, like an inclined plane, is capable of increasing energy. A) sometimes true B) always true C) always false D) sometimes false
C) always false
If the sun were twice as massive A) its pull on the Earth would double B) the pull of the Earth on the sun would double C) both of these D) neither of these
C) both of these
If no external forces are acting on a moving object, it will A) move slower and slower until it finally stops B) continue moving at the same speed C) continue moving at the same velocity
C) continue moving at the same velocity
Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force. The particle with both forces acting on it A) theoretically tends to accelerate toward the speed of light B) is brought to a rapid halt C) continues at the speed it had when it encountered the second force D) decelerates gradually to a halt E) none of these
C) continues at the speed it had when it encountered the second force
A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its vertical component of velocity A) remains unchanged B) increases C) decreases
C) decreases
An Earth satellite is simply a projectile A) floating motionless in space near the Earth B) approaching the Earth from outer space C) freely falling around the Earth
C) freely falling around the Earth
Padded dashboards in cars are safer in an accident than non-padded ones because an occupant hitting the dash has A) decreased time of impact B) decreased impluse C) increased time of impact D) increased momentum
C) increased time of impact
Two objects move toward each other because of gravity. As the objects get closer and closer, the acceleration of each A) remains constant B) decreases C) increases
C) increases
The reason a granite block is mostly empty space is that the atoms in the granite are A) not as close together as they could be B) held together be electrical forces C) mostly empty space themselves D) in perpetual motion E) invisible
C) mostly empty space themselves
If you push for a half hour or a whole hour against a stationary wall A) twice as much work is done during the half hour B) half as much work is done during the half hour C) no work on the wall is done in either case D) it is impossible to determine how much work is done
C) no work on the wall is done in either case
Of the sciences known as physics, chemistry, and biology, the most basic is A) chemistry B) biology C) physics D) none in particular, as each may be considered fundamental
C) physics
Eratosthenes learned about the position of the sun on June 22nd by A) consulting library information B) setting up a stick at Alexandria C) setting up sticks at both Syene and Alexandria D) None of the above choices are correct
C) setting up sticks at both Syene and Alexandria
Two factors that greatly affect air resistance on falling objects are the A) size and weight of the object B) size and mass of the object C) size and speed of the object
C) size and speed of the object
A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about A) half as much B) twice as much C) the same D) four times as much
C) the same
Planets would crash into the sun if it weren't for A) their relatively small masses B) the fact that they are beyond the main gravitation of the sun C) their tangential velocities D) their vast distances from the sun E) the inverse-square law
C) their tangential velocities
Which of these atoms has the most mass? A) hydrogen B) lead C) uranium D) iron E) all have the same masses
C) uranium
An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about A) 5 m/s B) 15 m/s C) 20 m/s D) 10 m/s E) not enough information given to estimate
D) 10 m/s
A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has A) 8 times the KE B) 4 times the KE C) 12 times the KE D) 16 times the KE
D) 16 times the KE
Do 100 J of work in 50 s and your power output is A) 50 W B) 1/2 W C) 5,000 W D) 2 W
D) 2 W
If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be A) 50 m/s B) 3600 m/s C) 500 m/s D) 3000 m/s
D) 3000 m/s
In science, theory is A) unchangeable B) an educated guess C) less than a fact D) a synthesis of a large body of well-tested knowledge
D) a synthesis of large body of well-tested knowledge
The Doppler effect is characteristic of A) water waves B) light waves C) sound waves D) all of the above choices E) none of the above choices
D) all of the above choices
An object in mechanical equilibrium is an object A) moving with constant velocity B) having no acceleration C) at rest D) all of these
D) all of these
Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much A) volume B) inertia C) mass D) all of these E) none of these
D) all of these
The air in this room has A) energy B) weight C) mass D) all of these E) none of these
D) all of these
Which has zero acceleration? An object A) at rest B) in mechanical equilibrium C) moving at constant velocity D) all of these E) none of these
D) all of these
For an action force, there must be a reaction force that A) is slightly larger in amplitude than the reaction force B) always acts in the same direction C) is slightly smaller in magnitude than the action force D) is exactly equal in magnitude
D) is exactly equal in magnitude
A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun, straight down towards the water. Neglecting air resistance, the acceleration just before striking the water A) depends on how high they started B) is greater for the dropped bullet C) is greater for the fired bullet D) is the same for each bullet E) none of these
D) is the same for each bullet
Starting from rest, the distance a freely falling object will fall in 0.5 seconds is about A) 10 m B) 1 m C) 1.00 m D) none of the above
D) none of the above
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the A) momentum of the rifle is smaller B) momentum is mainly concentrated in the bullet C) force against the rifle is smaller than against the bullet D) rifle has much more mass than the bullet
D) rifle has much more mass than the bullet
A sheet of paper can be withdrawn from under a container of milk without topping it if the paper is jerked quickly. This best demonstrates that A) the milk carton has no acceleration B) there is an action-reaction pair of forces C) gravity tends to hold the milk carton secure D) the milk carton has inertian E) none of these
D) the milk carton has inertia
What makes an element distinct? A) the number of electrons B) the total mass of all the particles C) the number of neutrons D) the number of protons E) none of these
D) the number of protons
Compared to the mass of a certain object on Earth, the mass of the same object on the moon is A) six times as much B) zero C) one sixth as much D) the same
D) the same
Atoms heavier than helium were made by? A) radiant energy conversion B) photosynthesis C) radioactivity D) thermonuclear fusion E) none of these
D) thermonuclear fusion
If you push an object twice as far while applying the same force, you do A) four times as much work B) the same amount of work C) half as much work D) twice as much work
D) twice as much work
The smallest particle of those listed below is A) an atom B) a neutron C) a proton D) a molecule E) a quark
E) a quark
The two measurements necessary for calculating average speed are A) velocity and distance B) velocity and time C) acceleration and time D) distance and acceleration E) distance and time
E) distance and time
A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground? A) 32 J B) 8 J C) 80 J D) 6 J E) none of the above choices
E) none of the above choices