Magnetism, Energy and Electricity

What is energy

• anything that radiates light or heat

• any object in motion

• anything that makes matter move or change

What is the difference between kinetic and potential energy?

• Kinetic energy has to do with chemistry; potential with physics

• Kinetic is objects at rest; potential is motion

• Potential is energy of objects at rest; Kinetic energy is motion

At what point in its fall does the kinetic energy of a freely falling object equal its potential energy?

• half way between the start and the end

• At the end of the fall

• At the start of the fall

If an object is NOT moving, it does not have

• chemical potential energy

• kinetic energy

• gravitational potential energy

Which of these has kinetic energy?

• A ball sitting on the edge of a cliff

• A ball moving through the air

• A ball sitting on a table

Which of the following has the most potential energy

• a ball resting on the ground

• A ball sitting on the mountain top

• A ball that's been thrown in the air

The amount of kinetic energy an object has depends on its

• speed and density

• mass and speed

• volume and friction

For moving objects, friction acts as a kind of

• brake

• motor

• accelerator

A green plant has _____________ energy

• chemical

• thermal

• kinetic

When a rubber band is stretched, it has ______________ energy

• chemical

• potential

• nuclear