1. Work
Force (N)
Work (joules)
W = F x d
Distance (m)

3. Work
Key Question:
What happens when you multiply forces in machines?

4. Power
Work (joules)
Power (watts)
P = W t
Time (sec)

5. Energy Energy is the ability to do work.
Any object that has energy has the ability to create force.
Energy is measured in the same units as work.
A joule is a unit of force that acts over a distance.

6. Potential Energy Ep = mgh Mass (kg) Potential Energy (joules)
Height (m)
Acceleration
of gravity (m/sec2)

7. Kinetic Energy Ek = 1 mv2 2 Mass (kg) Kinetic Energy Speed (m/sec)
(joules)
Ek = 1 mv2 2
Speed (m/sec)

8. Energy Conservation What is energy and how does it behave?
Key Question:
What is energy and how does it behave?

9. Energy Transformations
Energy transformations occur between different types of energy.
radiant energy
electrical energy
chemical energy
nuclear energy

10. Energy Transformations in a Power Plant
Power plants convert chemical energy into electrical energy.
chemical energy
heat energy
mechanical energy
electrical energy

12. Energy Transformations
Key Question:
Where did the energy go?