1. ENERGY The SI unit of energy is the Joule.
the ability (capacity) to do work
The SI unit of energy is the Joule.
Energy, like work, is a scalar quantity.

2. FORMS OF ENERGY MECHANICAL - energy relating to moving objects
HEAT- energy related to the vibration of the particles that make up an object
CHEMICAL - energy related to the bonds that hold particles together
ELECTROMAGNETIC - energy related to moving electrical charges
NUCLEAR - energy related to the decay of the nucleus of atoms

3. KINETIC ENERGY – energy of motion
KE = 1/2 mv2
KE - the kinetic energy in J
m - mass of the object in kg
v - speed of the object in m/s

4. WORK –ENERGY THEOREM The net work done on an object is
equal to its change in kinetic energy

5. GRAVITATIONAL POTENTIAL ENERGY – energy of position
PE = mgh
PE - the potential energy in J
m - mass of the object in kg
g – acceleration due to
gravity (9.8 m/s2)
h - height of the object in m

6. LAW OF CONSERVATION OF ENERGY Energy can neither be created nor be destroyed; it can only be transformed
The sum of all types of energy before the event is equal to all types of energy after the event

7. LAW OF CONSERVATION OF ENERGY
A cyclist slows down as it approaches the summit of the mountain (High PE-Low KE) and speeds up as he descends from the mountain (Low PE-High KE)

8. POWER - rate at which work is being done
POWER (Watt) = WORK (Joule)
TIME (Second)
1 HP = 550 foot-lbs/sec
= watts