Energy Transfer

Work is a transfer of

• energy

• force

• mass

• motion

The energy of motion is called

• kinetic energy

• potential energy

• thermal energy

• work

A 13-kg sled is moving at a speed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?

• 1.5 m/s

• 4.2 m/s

• 6 m/s

• 9 m/s

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

• a wind-up toy that has been wound up

• a compressed basketball

• a stretched rubber band

• all of the above

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

• both a and c

A 4-kilogram cat is resting on top of a bookshelf that is 3 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?

• 7 J

• 12 J

• 29 J

• 118 J

Which of the following increases when an object becomes warmer?

• chemical energy

• elastic potential energy

• nuclear energy

• thermal energy

The energy stored in gasoline is?

• chemical energy

• electromagnetic energy

• mechanical energy

• nuclear energy

Nuclear power plants are designed to convert nuclear energy into what type of energy?

• chemical

• electrical

• geothermal

• mechanical

Solar cells convert what type of energy into electrical energy?

• chemical

• electromagnetic

• nuclear

• thermal