Quiz about AP Physics 1 Work Energy Power

Question 1

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

Accepted Answer

picking up a pile of books from the floor

Answer

holding a heavy stack of books while standing

Answer

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

Answer

dropping a stack of books onto a table

Question 2

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

Accepted Answer

0 J

Answer

15 J

Answer

45 J

Answer

5 J

Question 3

What unit do we use for measuring power?

Accepted Answer

Watts

Answer

Joules

Answer

Newtons

Answer

ft/lbs

Question 4

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?

Accepted Answer

5100 J

Answer

4100 J

Answer

3100 J

Answer

45900 J

Question 5

Which are correct units for work?

Accepted Answer

N x m

Answer

N x s

Answer

J/s

Answer

W

Question 6

Which are correct equivalent units for power?

Accepted Answer

J/s

Answer

N x s

Answer

N x m

Answer

J

Question 7

How are work and energy related?

Accepted Answer

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

Answer

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

Answer

Energy is mgh, and work is mv²/2

Question 8

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

Accepted Answer

Work-Energy Theorem

Answer

Law of Conservation of Energy

Answer

Newton's Fourth Law

Answer

Efficiency

Question 9

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

Accepted Answer

Pulling force

Answer

Weight

Answer

Normal forrce

Answer

Friction

Question 10

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.

Accepted Answer

500 W

Answer

750 W

Answer

7500 W

Answer

2812500 W

Question 11

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.

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 12

Bob (80 kg) uses 180 N of force to get him up the slope. The vertical distance is 2 m and the diagonal is 10 m. Calculate the work he does.

Accepted Answer

1800 J

Answer

1600 J

Answer

160 J

Answer

3600 J

Question 13

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 14

On a force versus change in position graph, the area under the curve is a representation of...

Accepted Answer

work

Answer

power

Answer

KE

Answer

PE

Question 15

How far does a car that pulled with a 5,000 N force go if 18,000 J of work is done on it?

Accepted Answer

3.6 m

Answer

3.8 m

Answer

3.7 m

Answer

3.2 m

Question 16

Groot rescues Rocket from the bottom of a deep pit. Groot expends 1000 J of energy lifting Rocket who has a mass of 50 kg out of the pit. How deep is the pit?

Accepted Answer

2 m

Answer

0.5 m

Answer

4 m

Answer

10 m

Question 17

What is the weight of an object if 75 J of work is done to lift it uniformly 6.0 m

Accepted Answer

13 N

Answer

450 N

Answer

1.3 kg

Answer

130 kg

Question 18

Which of the following would be a measure of Work?

Accepted Answer

45 J

Answer

13 W

Answer

14 m

Answer

10 N

Question 19

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.

Accepted Answer

None of these are correct.

Answer

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

Answer

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

Answer

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

Answer

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

Question 20

A 2 kg ball is attached to a 0.80 m string and whirled in a horizontal circle at a constant speed of 6 m/s. The work done on the ball during each revolution is...

Accepted Answer

zero

Answer

16 J

Answer

72 J

Answer

90 J

Question 21

If L, M, and T denote the dimensions of length, mass, and time, respectively, what are the dimensions of power?

Accepted Answer

ML2/T3

Answer

L2M/T2

Answer

M2L/T2

Answer

M2L/T3

Question 22

A system consists of two objects having masses m_land m₂ (m_l < m₂). The objects are connected by a massless string, hung over a pulley as shown, and then released. When the object of mass m₂ has descended a distance h, the potential energy of the system has decreased by...

Accepted Answer

(m₂ - m_l)gh

Answer

m2gh

Answer

(m₁ + m₂)gh

Answer

none of these

Question 23

The following graphs, all drawn to the same scale, represent the net force F as a function of displacement x for an object that moves along a straight line. Which graph represents the force that will cause the greatest change in the kinetic energy of the object from x = 0 to x = x₁?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 24

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

AP Physics 1 Work Energy Power

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