PE and KE Practice Test Part 2

An extended spring stores:

• radiant energy

• potential energy

• kinetic energy

• chemical energy

A 1,500-kg car accelerates along a flat track to a speed of 20 m/s. How much does its gravitational potential energy increase over the length of the track?

• 0 joules

• 75 joules

• 30,000 joules

• 300,000 joules

Potential energy is energy due to the:

• motion of an object

• height of an object

• temperature of an object

• speed of an object

When gasoline is used as fuel in an automobile engine several energy transformations take place. Which of the following statements does NOT agree with the law of conservation of energy?

• When gasoline is burned, its energy is destroyed.

• The energy from the gasoline can be transformed to produce light.

• As the energy in the form of gasoline decreases, the energy increases in another form.

• Once the energy in the gasoline is released, it can never be destroyed.

The brakes on an automobile become hot when they are used continuously because:

• kinetic energy is being converted to thermal energy.

• potential energy is being converted to thermal energy.

• the friction of the brakes causes an increase in kinetic energy..

• the friction of the brakes causes an increase in potential energy.

While sitting next to a campfire, Kenai noticed several different forms of energy being transformed from the potential chemical energy of the wood. Which form of energy would she NOT be able to recognize in the campfire?

• heat

• nuclear

• light

• sound

As an object is raised to a higher position, which type of energy increases?

• kinetic energy

• potential energy

• heat energy

• light energy

Which type of energy does a stretched spring contain?

• Radiant energy

• Electrical energy

• Chemical energy

• Elastic energy

A 0.6-kilogram basketball balances on the rim of a basketball hoop that is 3 meters high. What is the basketball’s potential energy?

• 1.8 J

• 5 J

• 9J

• 18 J

If you go twice as fast, your kinetic energy becomes:

• 2 times smaller.

• 4 times smaller.

• 2 times bigger.

• 4 times bigger .