Quantity	Definition	Formula	Unit
Gravitational Potential Energy	Energy possesed by an object due to its height above ground, depends on its weight as well	mass x  acceleration due to gravity (10 m/s2) x height above ground PE = mgh	Joules (J)
Kinetic Energy	Energy possessed by an object due to its moving speed, depends on its mass as well	1/2 x mass x velocity2 KE = 1/2mv2	Joules (J)

 
 Conservation of Energy

• When one form of energy is "lost", it merely changes to another form.
• Energy cannot be destroyed and it cannot be created.
• Energy can only change from one form to another.