Work is a transfer of

• energy

• mass

• force

• motion

The energy of motion is called

• kinetic energy

• thermal energy

• potential energy

• work

A small 30-kg canoe is floating downriver at a speed of 2 m/s. What is the canoe’s kinetic energy?

• 32 J

• 60 J

• 4.2 J

• 120 J

An object’s gravitational potential energy is NOT directly related to which of the following?

• its height relative to a reference level

• its speed

• its mass

• the acceleration due to gravity

Which of the following is an example of an object with elastic potential energy?

• a wind-up toy that has been wound up

• a stretched rubber band

• a compressed basketball

• all of the answers

Why is the gravitational potential energy of an object 1 meter above the moon’s surface less than its potential energy 1 meter above the Earth’s surface?

• The object’s mass is less on the moon.

• The object’s weight is more on the moon.

• The object’s acceleration due to gravity is less on the moon.

A 4-kg cat is resting on top of a bookshelf that is 2 meters high. What is the cat’s gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s²?

• 6 J

• 8 J

• 20 J

• 78 J

The gravitational potential energy of an object is always measured relative to the

• location where the object’s kinetic energy is zero.

• position of maximum mechanical energy.

• reference level from which height is measured.

• surface of Earth.

Which of the following increases when an object becomes warmer?

• chemical energy

• thermal energy

• nuclear energy

• elastic potential energy

The energy stored in gasoline is

• chemical

• mechanical

• electromagnetic

• nuclear