Harnessing Human Energy Review

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state.

Front

What happens to the potential energy of a rock at the edge of a cliff?

Back

The rock has potential energy because of its height above the ground.

Front

Can objects create their own energy?

Back

No, objects cannot create their own energy; they can only transform energy from one form to another.

Front

What happens to a wind-up toy when it is wound up but not released?

Back

It has potential energy stored in its wound-up spring.

Front

What type of energy does a moving car have?

Back

A moving car has kinetic energy.

Front

What type of energy does a battery have when it is fully charged?

Back

A fully charged battery has potential energy.

Front

What is the energy of a stationary object?

Back

A stationary object has no kinetic energy, but it may have potential energy depending on its position.

Front

What happens to the energy of a phone that has run out of battery?

Back

The phone has no energy when it has run out of battery.

Front

Is it true that energy can be created or destroyed?

Back

False, energy cannot be created or destroyed; it can only change forms.