The Princeton Review Chapter 7 Work, Energy, and Power

Pregunta 1 de 10

1

A force F of strength 20 N acts on an object of mass 3 kg as it moves a distance of 4 m. If F is perpendicular to the 4 m displacement, the work it does is equal to

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0 J
60 J
80 J
600 J
2,400 J

Explicación

Pregunta 2 de 10

1

Under the influence of a force, an object of mass 4 kg accelerates from 3 m/s to 6 m/s in 8 s. How much work was done on the object during this time?

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27 J
54 J
72 J
96 J
Cannot be determined from the information given

Explicación

Pregunta 3 de 10

1

A box of mass m slides down a frictionless inclined plane of length L and vertical height h. What is the change in its gravitational potential energy?

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Explicación

Pregunta 4 de 10

1

A 4 kg box is pulled up a ramp of angle theta = 30º and height = 5 m at a constant velocity. How much work is done by the normal force?

Selecciona una de las siguientes respuestas posibles:

160 J
80 J
40 J
20 J
0 J

Explicación

Pregunta 5 de 10

1

A man stands in an elevator as it begins to ascend. Does the normal force from the floor do work on the man?

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Yes, and the work done will be positive.
Yes, and the work done will be negative.
Yes, but the sign can't be determined.
No, the normal force will do no work in any situation.
No, the normal force will do no work in this situation, but it can in others.

Explicación

Pregunta 6 de 10

1

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30º with the horizontal. If the block is released from rest at the top of the incline, what is its speed at the bottom?

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5.0 m/s
5.7 m/s
6.4 m/s
8.0 m/s
10 m/s

Explicación

Pregunta 7 de 10

1

A block of mass m slides from rest down an inclined plane of length s and height h. If F is the magnitude of the force of kinetic friction acting on the block as it slides, then the kinetic energy of the block when it reaches the bottom of the incline will be equal to

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 10

1

If a 1,000 kg car is accelerating at a rate of 4 m/s^2 and experiencing 300 N of drag force, how much force do the engines have to produce? Ignore any frictional effects with the road.

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16,300 N
15,700 N
4,300 N
4,000 N
3,700 N

Explicación

Pregunta 9 de 10

1

An astronaut drops a rock from the top of a crater on the Moon. When the rock is halfway down to the bottom of the crater, its speed is what fraction of its final impact speed?

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Explicación

Pregunta 10 de 10

1

A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?

Selecciona una de las siguientes respuestas posibles:

50 W
100 W
200 W
400 W
Cannot be determined from the information given

	Creado por Anibal Santamaria hace alrededor de 7 años

AP Physics C Test sobre The Princeton Review Chapter 7 Work, Energy, and Power, creado por Anibal Santamaria el 25/07/2017.

The Princeton Review Chapter 7 Work, Energy, and Power

Pregunta 1 de 10

A force F of strength 20 N acts on an object of mass 3 kg as it moves a distance of 4 m. If F is perpendicular to the 4 m displacement, the work it does is equal to

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 10

Under the influence of a force, an object of mass 4 kg accelerates from 3 m/s to 6 m/s in 8 s. How much work was done on the object during this time?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 10

A box of mass m slides down a frictionless inclined plane of length L and vertical height h. What is the change in its gravitational potential energy?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 10

A 4 kg box is pulled up a ramp of angle theta = 30º and height = 5 m at a constant velocity. How much work is done by the normal force?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 10

A man stands in an elevator as it begins to ascend. Does the normal force from the floor do work on the man?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 10

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30º with the horizontal. If the block is released from rest at the top of the incline, what is its speed at the bottom?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 10

A block of mass m slides from rest down an inclined plane of length s and height h. If F is the magnitude of the force of kinetic friction acting on the block as it slides, then the kinetic energy of the block when it reaches the bottom of the incline will be equal to

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 10

If a 1,000 kg car is accelerating at a rate of 4 m/s^2 and experiencing 300 N of drag force, how much force do the engines have to produce? Ignore any frictional effects with the road.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 10

An astronaut drops a rock from the top of a crater on the Moon. When the rock is halfway down to the bottom of the crater, its speed is what fraction of its final impact speed?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 10

A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?

Selecciona una de las siguientes respuestas posibles:

Explicación