Energy

1. cause state change

2. KE

2.1. when there is speed

2.2. if speed constant, KE constant

2.3. will increase (in general), if obj falls

3. Work Done

3.1. refers to energy transfer TO an obj/sys

3.1.1. work done by force/obj

3.1.2. work done on obj

3.2. refers to energy transfer OUT OF an obj/sys

3.2.1. work done against force/obj

4. Thermal Energy

4.1. cause temperature rise

4.2. cause vol change (minor point)

5. Oscillation

5.1. GPE Max at the ends of the oscillation motion

5.2. KE Max at the center position of the oscillation motion

6. efficiency

6.1. ratio between USEFUL output to input

7. Principle of Energy Conservation

7.1. cannot be created or destroyed

7.2. can be transferred between bodies

7.3. can be converted to different forms

8. PE

8.1. energy stored

8.1.1. GPE

8.1.1.1. stored by height

8.1.1.2. if height drop, GPE drop

8.1.2. CPE

8.1.2.1. stored in chemical bonds, released by chemical reaction

8.1.3. EPE

8.1.3.1. stored in springs or elastic material

9. formula

9.1. GPE = mgh

9.2. KE = 0.5mv^2

9.3. WD = force x parallel distance

9.4. Q = mc(dT)

9.5. L = ml

10. Power

10.1. the rate of CHANGE of energy

10.1.1. from one form to another

10.1.2. from one body to another body