Look at the picture of the runaway shopping cart and answer the following question:

P Q R S

mass=20g mass=40g mass=20g mass=20g

velocity=4m/s velocity =4m/s velocity=5m/s velocity=10m/s

1. Which shopping cart is easier to stop?
   1. P
   2. Q
   3. R
   4. S

Complete the following:

1. An object has less kinetic energy when it has _____ mass.
   1. More
   2. Less
   3. The same

1. An object has less kinetic energy when it has _____ velocity.
   1. More
   2. Less
   3. The same

1. When you slow down your car by applying the brakes, what happens to the mechanical energy of the motion of your car?
   1. It is converted into thermal energy through friction
   2. It is converted into chemical energy in the form of gasoline
   3. It is stored as gravitational potential energy
   4. It is stored as chemical energy in the battery
   5. None of the above

1. Give an example of chemical energy.

1. Name the two reference points found on a thermometer be specific in your answer.