Question 1

A 2 kg block is pushed with a net force of 10 N. What is its acceleration?

Accepted Answer

5 m/s²

Question 2

A 3 kg object is at rest at the top of a 5 m high hill. What is its potential energy relative to the bottom? (Assume g = 9.8 m/s²)

Accepted Answer

147 J

Question 3

A 4 kg cart is moving at 3 m/s. What is its kinetic energy?

Accepted Answer

24 J

Question 4

A person pulls a sled with a force of 50 N at an angle of 60° above the horizontal for 10 m. How much work is done by the person?

Accepted Answer

250 J

Question 5

A ball is dropped from a height of 10 m. Ignoring air resistance, what is its speed just before hitting the ground? (g = 9.8 m/s²)

Accepted Answer

Approximately 14 m/s

Question 6

Which of the following best illustrates Newton's Third Law?

Accepted Answer

A swimmer pushing water backward and moving forward

Question 7

A 5 kg object is moving at 2 m/s at the top of a 3 m hill. What is its total mechanical energy at the top? (g = 9.8 m/s²)

Accepted Answer

79 J

Question 8

A 10 kg box is pushed 5 m across a floor by a horizontal force of 20 N. How much work is done?

Accepted Answer

100 J

Question 9

A roller coaster car of mass 500 kg starts from rest at a height of 20 m. What is its speed at the bottom, assuming no friction? (g = 9.8 m/s²)

Accepted Answer

20 m/s

Question 10

Which scenario best demonstrates the law of conservation of energy?

Accepted Answer

A ball thrown upward slows down as it rises and speeds up as it falls

Question 11

A 2 kg object is moving at 5 m/s. If a net force of 6 N acts on it in the direction of motion, what will its acceleration be?

Accepted Answer

3 m/s²

Question 12

A 1.5 kg ball is thrown vertically upward with a speed of 8 m/s. What is its kinetic energy at launch?

Accepted Answer

12 J

Question 13

A 10 kg object is lifted to a shelf 2 m high. How much work is done against gravity? (g = 9.8 m/s²)

Accepted Answer

196 J

Question 14

A 0.5 kg ball is dropped from a height of 4 m. What is its kinetic energy just before it hits the ground? (g = 9.8 m/s²)

Accepted Answer

19.6 J

Question 15

A force of 30 N is applied at an angle of 45° to the horizontal, moving an object 6 m. How much work is done?

Accepted Answer

127.3 J

Question 16

Which of the following statements about energy is correct?

Accepted Answer

Energy can be transformed from one form to another

Question 17

A 2 kg mass is moving at 4 m/s at the bottom of a hill. If it started from rest at the top, what was the height of the hill? (g = 9.8 m/s²)

Accepted Answer

1.63 m

Question 18

A 1 kg object is moving at 10 m/s. If it comes to rest after traveling 20 m due to friction, what is the average friction force?

Accepted Answer

2.5 N

Question 19

Which of the following is NOT an example of work being done?

Accepted Answer

Holding a heavy box stationary

Question 20

A 3 kg object is moving at 6 m/s. What is its kinetic energy, and which Bloom’s Taxonomy skill does this question test?

Accepted Answer

54 J; Knowledge

Key Concepts: Newton's Laws, Work, Energy, and Conservation

Study Guide - Practice Questions