Introduction to Energy

Question 1

If a bouncing ball has a total energy of 20 J and a kinetic energy of 5 J, the ball’s potential energy isJ.

Revolt · Accepted Answer

15

Question 2

If the kinetic energy of the ball decreases, then the potential energy will.

Revolt · Accepted Answer

increase

Question 3

An object at positionhas about half potential energy and half kinetic energy.

Revolt · Accepted Answer

B

Question 4

A roller coaster train with a mass of 500 kg stops at the top of a hill. If the hill is 110 m high, what is the potential energy of the train?

Revolt · Accepted Answer

539,000 J

Question 5

A skier with a potential energy of 137,200 J waits on top of a ski jump that is 200 m high. What is the mass of the skier?

Revolt · Accepted Answer

70 kg

Question 6

A conveyer belt moves a 40 kg box at a velocity of 2 m/s. What is the kinetic energy of the box while it is on the conveyor belt?

Revolt · Accepted Answer

80 J

Question 7

An object at positionhas all kinetic energy.

Revolt · Accepted Answer

C

Question 8

An object at positionhas all potential energy.

Revolt · Accepted Answer

A

Introduction to Energy Answers