# Which statement best describes how work and power are different?

To find work we need to know force and distance; to find power we need to know force and velocity.

To find work we need to know energy and time; to find power we need to know energy and distance.

To find work we need to know velocity and distance; to find power we need to know distance and time.

To find work we need to know distance and force; to find power we need to know energy and velocity.

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Question 2 (Multiple Choice Worth 2 points)

There is a large box and a small box on a table. The same force is applied to both boxes. The large box moves two feet and the small box moves one foot. Which movement shows the most work done?

The movement of the large box shows more work because the box moved a longer distance.

The work done is equal because the same force was applied to both boxes.

The movement of the small box shows more work because the box moved a shorter distance.

The work done was equal because both boxes moved in the same direction as the force.

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Question 3 (Multiple Choice Worth 2 points)

If we want to describe work, we must have

an action which causes no movement or reaction.

a force and a movement in the opposite direction of the force.

a force and a movement in the same direction as the force.

an action which causes movement and an opposite reaction.

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Question 4 (Multiple Choice Worth 2 points)

When describing how power and work are similar you would want to mention that

you must know time to determine both work and power.

you must know force in order determine both work and power.

you must know energy in order to determine both work and power.

you must know velocity to determine both work and power.

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Question 5 (Multiple Choice Worth 2 points)

A football player pushes against another player trying to block him from moving any ƒᴀʀтher down the field. Which term best describes this example?

negative work

positive work

negative force

positive force

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Question 6 (Multiple Choice Worth 2 points)

There was less work done. Which of the statements describes how this is possible?

There was less force applied or there was less movement.

There was more force applied and the movement did not change.

There was more force applied and there was more movement.

There was more force applied or there was more movement.

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Question 7 (Multiple Choice Worth 2 points)

If we decrease the amount of force, and keep all other factors the same, what will happen to the amount of work?

The amount of work will go down because the distance will decrease.

The amount of work will go up because the distance will decrease.

The amount of work will go down because the distance will increase.

The amount of work will go up because the distance will increase.

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Question 8 (Multiple Choice Worth 2 points)

If you are given time and distance, you can determine power if you know

force.

watts.

energy.

joules.

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Question 9 (Multiple Choice Worth 2 points)

We cannot consider something to be work unless

force is applied to an object resulting in balanced forces.

forces that caused the action were unbalanced and the action occurred in the opposite direction.

action was equal to the reaction and was the result of a balanced force.

force applied causes movement of an object in the same direction as the applied force.

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Question 10 (Multiple Choice Worth 2 points)

If we know the force, the distance, and the time we can calculate

only power.

work and power.

only work.

neither work or power.

• 1 a)

2 b)

3 c)

4 b)

6 a)

7 d)

8 a)

10 b)

Source(s): 110% on Physic exam, Holt Physics
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