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Work, energy and power - Coggle Diagram
Work, energy and power
Gravitational potential energy
Ep = Mass X GFS X height
If an object moves under gravity, the GPE changes
Kinetic energy
A bouncy ball being dropped
Initially the balll only has GPE
It is dropped, work is done by the force of gravity to convert the energy from GPE to kinetic energy
Just before impact with the ground, the ball has its maximum KE and minimum GPE(0)
On impact, work is done to convert the KE to EPE, which deforms the ball
The hotter the ball, the more it bounces as it has more energy
When an object is moving, it has kinetic energy
The faster it moved, the more KE it has
1/2 X mass X velocity^2
Power
Work done or energy transferred per unit time
Measured in Watts
Power = Energy / Time
Power = Work Done / Time
Power = Force X Velocity
Efficiency
( Useful energy output / Total energy ) X 100
( Useful Power output / Total power) X 100
Gravitational potential / electrical energy