Mike and Peter are climbing to the top. Both take the same time, do the same route, but Mike has a mass of 25 kg while Peter has a mass of 30 kg. (He is a bit taller). Which penguin does the most work and why.

Peter as he does more work over the same time than Mike because he has a bigger weight force

Mike as shorter people have shorter legs and does more work.

Mike and Peter do the same amount of work as they do the same route in the same time.

Peter as he does the same amount of work but in a smaller amount of time.

Winnie and Eeyore have the same mass and have just finished climbing the same tree, but Eeyore was 4 seconds faster then Winnie. Who used the most power?

Eeyore as he did the same amount of work as Winnie but in a shorter time.

Winnie as he took the longer time and did the same amount of work as Eeyore

Winnie as he is shorter and could grip more as so did more work overall

Eeyore as he did more work than Winnie but in a shorter time

Bowling Ball A is dropped from a point halfway up a cliff. A second identical bowling ball, B, is dropped simultaneously from the top of the cliff. Comparing the bowling balls at the instant they reach the ground, which of the following are correct? Neglect air resistance.

Ball A has half the kinetic energy and takes half the time to hit the ground as Ball B.

Ball A has half the kinetic energy and takes one-fourth the time to hit the ground as Ball B.

Ball A has half the final velocity and takes half the time to hit the ground as Ball B.

Ball A has one-fourth the final velocity and takes one-fourth the time to hit the ground as Ball B.

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

Yes, and the work done will be positive.

Yes, and the work done will be negative.

Yes, but the sign can’t be determined.

A 1-kg object is released from rest at the top of a rough-surfaced incline. The object slides without rotating to the bottom of the incline. The object’s kinetic energy at the bottom must be...

less than the block’s gravitational potential energy when it was released, because the gravitational potential energy was converted both to thermal energy and to kinetic energy.

equal to the block’s gravitational potential energy when it was released, because total mechanical energy must be conserved.

equal to the block’s gravitational potential energy when it was released, because the gain in kinetic energy compensates for the mechanical energy lost to thermal energy on the rough incline.

less than the block’s gravitational potential energy when it was released, because the work done by the friction force must be greater than the block’s gain in kinetic energy.

A block on a horizontal frictionless plane is attached to a spring, as shown. The block oscillates along the x-axis with amplitude A. Which of the following statements about energy is correct?

The potential energy of the spring is at a minimum at x = 0.

The kinetic energy of the block is at a minimum at x =0.

The potential energy of the spring is at a minimum at x = A.

The kinetic energy of the block is at a maximum at x = A.

AP Physics 1 Work Energy Power

Authored by Charles Martinez

Science

12th Grade

NGSS covered

Used 2+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

In which of the following situations do your arms do work on books?

holding a heavy stack of books while standing

pushing down on a heavy stack of books lying on a table

dropping a stack of books onto a table

picking up a pile of books from the floor

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

15 J

45 J

0 J

5 J

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What unit do we use for measuring power?

Watts

Joules

Newtons

ft/lbs

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?

4100 J

3100 J

5100 J

45900 J

Which are correct units for work?

N x s

N x m

J/s

Which are correct equivalent units for power?

N x s

N x m

J/s

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How are work and energy related?

The work done by an external force acting on an object causes a change in the mechanical energy of the object.

Work is the same thing as energy. They are equal.

Energy is mgh, and work is mv²/2

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AP Physics 1 Work Energy Power

In which of the following situations do your arms do work on books?

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

What unit do we use for measuring power?

Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?

Which are correct units for work?

Which are correct equivalent units for power?

How are work and energy related?

Which principle states that whenever work is done, energy changes form?

If you pull the trolley along a flat floor horizontally. Which force do you use to calculate the work done.

Mike and Ian move 50 m on a snow lift which uses 750 N of force to move them in 75 seconds. Calculate the power of the lift.

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