kinetic and potential energy notes

Kinetic and Potential Energy

Kinetic Energy

Energy of MOTIONIf an object is moving it has KEMeasured using the formula:– KE = mass * velocity2

2

Examples:– Ball Rolling– Car Driving

Potential Energy

Potential Energy is the Energy of POSITION or SHAPEForm of Stored EnergyExamples:– Stretched bow or rubber band– Roller Coaster at top of hill– Gunpowder and food

Gravitational Potential Energy

A specific type of PECreated when you do work on an object by using a force that opposes gravity (lifting)Measured using the formula:– GPE = weight (N) * height (m)

Examples:– Diver on board– Car at top hill– Book on shelf

Mechanical Energy

Total energy of Motion and position of an object.Measured using the formula:– ME = KE + PE

ME always remains for a given objectExample:– Simple Online Pendulum

ME stays the same for bus as it goes down the

hill

ME = KE + PE

The bus at this position on the hill has a very high potential energy and little to know Kinetic Energy

PE = weight * height

KE = (mass * velocity2)/ 2

As the bus travels down the hill its PE decreases and its Kinetic Energy is increasing!

PE = weight * height

KE = (mass * velocity2)/ 2

ME stays the same for bus as it goes down the

hill

ME = KE + PE

At the bottom of the hill the bus has very low PE but very high KE

PE = weight * height

KE = (mass * velocity2)/ 2

ME stays the same for bus as it goes down the

hill

ME = KE + PE