Energy

Which explanation describes the relationship between motion and energy?

• An object that is not moving does not have any energy

• The slower an object moves, the higher the energy

• The faster an object moves, the higher the energy

• Motion and energy are not related

A scientist tests motion by rolling marbles down a ramp. The speed of the marble is different during each trial. What is the scientist likely changing in each trial?

• the size of the marble

• the direction of the roll

• the hand he or she rolls with

• the energy he or she puts into the roll

A roller coaster is moving on this track. At what point on the track does the coaster have the most kinetic energy?

• point A

• point B

• point C

• point D

A race car is observed going around a track. What information will show how much energy the car has?

• the direction

• the color of the car

• the speed

• the driver’s weight

A marble rolls down a ramp and hits a block. What happens to the speed and energy of the marble and the block following the collision?

• The speed and energy increase

• The speed and energy stay the same

• The speed and energy of both objects change

A soccer ball is kicked across a field and hits another soccer ball that is not moving. What will happen to the speed of the first soccer ball after the collision?

• The speed will first increase and then decrease

• The speed will increase

• The speed will stay the same

• The speed will decrease

A student observes a car driving down the street. What conclusion can the student make about the car?

• The car has energy

• The car has traveled a long way

• The car is fast

• The car is almost out of gas

Which is an example of kinetic energy?

• stretching a rubber band

• skateboarding down a hill

• winding a watch

• sitting at the top of a roller coaster track

An object with a lot of energy __________

• moves very fast

• does not move

• moves very slowly

Which of the following objects has the most energy?

• a truck moving at 25 miles per hour

• an airplane flying at 200 miles per hour

• a cat running at 6 miles per hour

• a soccer ball moving at 2 miles per hour