1. Potential and Kinetic Energy Use NB page 137

2. Activity How high does a ball bounce?
Hold a meter stick vertically, with the zero end on the ground
Drop a tennis ball from 50 cm. Record the height to which it bounces.
Drop the tennis ball from the 100 cm mark and record the height to which it bounces.
Predict how high the ball will bounce from the 75 cm mark. Test your prediction.

3. What is energy? change Produces Warmth Produces Light Produces Sound
Ability to do work or cause
change
Produces Warmth
Produces Light
Produces Sound
Produces Movement
Produces Growth
Powers Technology

4. How is all energy divided?
Potential
Energy
Kinetic
Energy
Gravitation
Potential
Energy
Elastic
Chemical
Nuclear

5. What is Potential Energy?
Energy that is stored and waiting to be used later

6. What is Gravitational Potential Energy?
Potential energy due to an object’s weight and height
P.E. = weight x height
Don’t look down Rover!
Good boy!

7. What is Elastic Potential Energy?
Potential energy due compression or expansion of an elastic object.
Expansion of string
Notice the ball compressing
and expanding

8. What is Chemical Potential Energy?
Potential energy stored within the chemical bonds of an object

9. What is Nuclear Potential Energy?
Energy stored in the nucleus of an atom.
Holds the atom together

10. What is Kinetic Energy? Energy an object has due to its motion
K.E. = .5(mass x speed2)

11. Summary of Energy
HW: Make a double bubble map comparing and contrasting potential and kinetic energy