1. Conversion of Energy
Forms of Energy
Energy
Work
Energy

2. Work
The product of force and displacement in the direction of the force
W = F x d
Units: Newton-meter, Nm
Equivalent to Joule, J

3. Work Example
A force of 10N is applied to a box to move it 2m along the floor. What is the work done on the box?
A bodybuilder, 1.6 m tall lifted a 30-kg weight from the ground up to his head. How much work did he do?

4. Energy The ability to do work Work ~ Energy Units: Nm, J May be:
Transferred
Stored
Transformed

5. Forms of Energy Kinetic Energy Potential Energy Energy due to motion
Equation:
EK = ½ mv2
Potential Energy
Energy due to position
Equation:
EP = mgh

6. Examples
What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second?
What is the potential energy of a 3 kilogram-ball that is 3m above the ground?

7. Forms of Energy Chemical Energy Nuclear Energy
Energy due to chemical reaction
Nuclear Energy
Energy due to nuclear reaction

8. Forms of Energy Thermal Energy Electrical Energy
Energy transferred due to difference in temperature
Electrical Energy
Energy due to movement of charges

9. Forms of Energy
Light Energy
Sound Energy

10. Conversion of Energy

11. Conversion of Energy