Physics

The questions with graphs are not on the quizlet they're on the review sheet

.

A basketball player jumped straight up to grab a rebound. If she was in the air for a total of 0.6 seconds, how high did she jump? (d=½at2) A. 0.88 m B. 3.10 m C. 0.44 m D. 1.76 m

0.44

A circuit has a source of potential difference, a resistance and

A wire

At point P in an electric field, the magnitude of the electrostatic force on a proton is 2.50 x 10 -10 newton. What is the magnitude of the electric field intensity at point P? A. 4.0 x 10-10 N/C B. 1.5 x 109 N/C C. 6.4 x 10-29 N/C D. 2.5 x 10-19 N/C

B. 1.5 x 109 N/C

The number of electrons that pass a certain point in a conductor in a given amount of time is defined as A. potential difference B. electric current C. resistance D. charge

B. electric current

What is the current through a wire if 240 coulombs of charge pass through the wire in 2.0 minutes? A. 420.0 A B. 8.0 A C. 2.0 A D. 110.0 A

C

How much work is required to move a single electron through a potential difference of 1000 volts? A. 1.6 x 10-21 J B. 1.6 x 10-22 J C. 1.6 x 10-16 J D. 1.6 x 10-18 J

C. 1.6 x 10-16 J

If the time required for a student to swim 500 meters is doubled, the power developed by the student will be A. doubled B. quartered C. halved D. quadrupled

C. Halved

When a rod is brought near a neutral electroscope, the leaves diverge. Which statement best describes the charge on the rod? A. It may be neutral. B. It must be negative. C. It may be positive or negative. D. It must be positive.

C. It may be positive or negative.

Energy is measured in the same units as A. force B. power C. work D. momentum

C. Work

A force is applied to a block, causing it to accelerate along a horizontal, frictionless surface. The energy gained by the block is equal to the A. momentum given to the block B. power applied to the block C. work done on the block D. impulse applied to the block

C. work done on the block

What is the charge of an electron? A. 9.11 x 10-31 C B. 1.67 x 10-27 C C. 6.25 x 1018 C D. -1.6 x 10-19 C

D. -1.6 x 10-19 C

At what constant speed can a 2,000-watt motor working at full capacity vertically lift a 400-newton weight? A. 0.2 m/s B. 50 m/s C. 2 x 103 m/s D. 5 m/s

D. 5 m/s

If the speed of a car is tripled, the kinetic energy of the car is A. 1/3 the original KE B. 3 times the original KE C. 1/9 the original KE D. 9 times the original KE

D. 9 times the original KE

An object that is traveling eastward and slowing down, will have a momentum that is directed westward True or false

False

As the distance between two charged objects increases, the strength of the electrostatic force between them decreases, and thus shows a direct relationship between distance and force. True or false

False

Power is a form of mechanical energy. True or false

False

The two factors that determine the amount of kinetic energy in an object are ____________________ and ____________________. mass and velocity mass and force weight and velocity weight and force

Mass and velocity

A mosquito flying over a highway strikes the windshield of a moving truck. Compared to the magnitude of the force of the truck on the mosquito during the collision, the magnitude of the force of the mosquito on the truck is A. larger B. smaller C. the same

The same

Accelerating objects must either be changing their speed or changing their direction True or False

True

As an object free-falls, its gravitational potential energy is decreased, its kinetic energy is increased, and its total mechanical energy remains unchanged. True or false?

True

Charges can only occur in multiples of 1.6 x 10-19, the magnitude of charge of an electron. A. True B. False

True

Electrostatic force is the force of attraction between opposite charges True or false

True

In a parallel circuit, the potential difference (V) is the same in all parts of the circuit and also is the same as the total number of volts. True or false

True

In a parallel circuit, when one bulb burns out the other bulbs are not affected. Bulb two in the circuit still has the same current, the same volts, and the same resistance. Therefore, bulb two must also have the same brightness. True or false?

True

Inertia is the tendency of all objects to resist a change in motion. True or false?

True

A man standing on a scale in an elevator notices that the scale reads 30 newtons less than his normal weight. Which type of movement of the elevator could cause this less- than-normal reading? A. moving downward at constant speed B. moving upward at constant speed C. accelerating upward D. accelerating downward

accelerating downward

If 20 joules of work is done in 4.0 seconds, the power developed is A. 80 watts B. 16 watts C. 0.20 watts D. 5.0 watts

5.0

In raising an object vertically at a constant speed of 2.0 meters per second, 10 watts of power is developed. What is the weight of the object? A. 50 N B. 20 N C. 40 N D. 5.0 N

5.0

The magnitude of the force that a baseball bat exerts on a ball is 50 Newtons. According to Newton's Third Law, the magnitude of the force that the ball exerts on the bat is 5.0 N 10 N 50 N 250 N

50

Gravitational force F exists between point objects A and B separated by distance R. What is the universal gravitational constant? A. 6.67 x 10-11 B. 8.87 x 10-11 C. 3.37 x 10-12 D. 6.67 x 10-24

6.67 x 10-11

How much work is done when a rock weighing 10 Newtons is lifted a vertical distance of 8 meters at 2 meters per second? A. 18 J B. 20 J C. 16 J D. 80 J

80

What is the potential energy of a stone that weighs 60 newtons when it is sitting on top of a wall 15 meters high? 900 4 75 45

900

A 10 kg box is resting on a horizontal countertop surface. Calculate the magnitude of the normal force acting upon the box. A. 98.1N directed upward B. 1.0N directed upward C. 98.1N directed downward D. 1.0N directed downward

98.1N directed upward

If a 15-ohm resistor is connected in parallel with a 30.0 Ω resistor, what is the equivalent resistance? 2 45 10 15

??

The weight of an object on Earth is 1.0 x 10^3 what is the mass of this object? A. 100 kg B. 50 kg C. 200 kg D. 45 kg

100

A football player kicks a ball with an initial velocity of 25 meters per second at an angle of 53° above the horizontal. What is the horizontal component of the initial velocity of the ball? A. 10 m/s B. 25 m/s C. 20 m/s D. 15 m/s

15

A student walks 6.0 kilometer due east and 3.0 kilometer due south. Then she runs 6.0 kilometers due west and 3 kilometers due north. The magnitude of the student's total distance is closest to A. 0 km B. 3.0 km C. 18 km D. 6.7 km

18

The resultant of two forces acting on the same point at the same time will be a minimum when the angle between the forces is 0° 180° 90° 45°

180

A weightlifter lifts a 2,000-newton weight a vertical distance of 0.5 meter in 0.1 second. What is the power output? A. 1 x 104 W B. 1 x 10-4 W C. 4 x 104 W D. 4 x 10-4 W

A. 1 x 104 W

Two metal spheres having charges of +4.0 x 10-6 coulomb and +2.0 x 10-6 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each sphere is A. 3.0 x 10-6 C B. 8.0 x 10-11 C C. 8.0 x 10-6 C D. 2.1 x 10-6 C

A. 3.0 x 10-6 C

Two metal spheres having charges of +4.0 x 10-6 coulomb and +4.0 x 10-6 coulomb are brought into contact and then separated. After separation, the charge on each sphere is A. 4.0 x 10-6 C B. 8.0 x 10-12 C C. 8.0 x 10-6 C D. 2.0 x 10-6 C

A. 4.0 x 10-6 C

How fast is a ball rolling and what type of energy does it have if it contains 98 J of energy and has a mass of 4 kg? A. 7m/s and Kinetic B. 49m/s and Kinetic C. 7m/s and Potential D. 49m/s and Potential

A. 7m/s and Kinetic

At what point in its fall does the kinetic energy of a freely falling object equal its potential energy? A. halfway between the start and the end B. at all points during the fall C. at the end of the fall D. at the start of the fall

A. halfway between the start and the end

Potential energy is measured in units of A. kg x m2/s2 B. kg2 x m/s2 C. kg x m/s2 D. kg2 x m2/s

A. kg x m2/s2

If the resistance of a circuit is doubled and the voltage remains unchanged, the current flowing in the circuit will be A. one-half as much B. twice as much C. one-fourth as much D. four times as much

A. one-half as much

There is a statue at the top of a tower that is 45 m high. The statue weighs 200 N. What type and how much energy does the statue have? A. potential and 9000 J B. kinetic and 9000 J C. potential and 8.82 x 104 J D. kinetic and 8.82 x 104 J

A. potential and 9000 J