WD = Fx D (J = N x d)
Work done = force x distance
Work done = movement AGAINST friction- Thermal energy is DISSIPATED.
GPE= m x g x h (J = kg x 10N/kg x m)
Gravitational Potential Energy = mass x gravitational field strength x height
KE = 1/2 x m x v2 (J = 1/2 x kg x m/s)
Kinetic energy = 1/2 x mass x velocity2
Efficiency = useful/total (x100) Power = useful/total (x100)
Rate is dependent on WASTED energy
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