Name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Per.
Date _ _ _ _ _ _ __
Kinetic and Potential Energy - Skills Check
Use the diagram to answer the question below.
Rocks A and B are the same size and have the same mass. Rock B is higher than Rock A.
1. Which rock has more potential energy? _ _ _ _ _ _ _ _ _ _ __
2. What is this form of potential energy called? _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
True or False: Write ItTrue" if the statement is true. Write "False" if the statement is false.
_ _ _ _ 3. Objects that have kinetic energy are not moving.
_ _ _ _ 4. A lit match has potential energy.
_ _ _ _ 5. A thrown baseball has kinetic energy.
_ _ _ _ 6. Potential energy is energy of motion.
_ _ _ _ 7. If a car's speed increases then its kinetic energy increases.
_ _ _ _ 8. Two identical books are on the same shelf. They have different amount of potential
energy.
_ _ _ _ 9. A toaster uses elastic potential energy to make toast.
_ _ _ _ 10. Two skiers with different masses are at the top of the same hill. The skier with more
mass has more gravitational potential energy.
11. The potential energy of an object depends on which two factors? _ _ _ _ _ _ _ _ _ _ __
How can
energy change
forms?
Have you ever ridden a roller coaster? A
roller coaster is a good example of how
energy can change from one form to another.
When you first climb into the car at the
bottom of the hill, the car has no potential
ene~gy. A chain must pull you up the first
big hill. That chain changes electrical energy
into potential energy. When the cars are at
the top, they can fall downward. Potential
energy changes to kinetic energy as the cars
plunge down one hill and up the next hill.
The cars slow as they reach the top of the
hill. The kinetic energy that pushed them up
the hill has changed back to potential
energy. That stored energy converts to
kinetic energy as the cars zoom down again.
You might notice that
the hills get smaller
and smaller during the
ride. Although energy
is not actually lost,
friction converts some
of it to other forms of
energy, such as heat
energy. The heat
energy warms the
tracks and the air but
is not useful for
propelling the cars
forward.
1.
What kind of energy, Kinetic or Potentiat does the car have at the top of the hill?
2.
What kind of energy, Kinetic or Potential, does the car have as it travels down the hills?
3.
The hills get smaller and smaller because some of the energy is being transformed (converted)
into _ _ _ _ _ _ _ _ _ energy caused by _ _ _ _ _ _ __
(circle one)