# Physics Equations Revisions

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Ek = 1/2 x m x v2 or Ek= 1/2mv2
Kinetic energy(J) = 0.5 x mass(kg) x velocity squared (m/s)2
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Ep = m x g x h or Ep = mgh
GPE (J)= mass(kg) x gravitational field strength(N/kg) x height(m)
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Ee = 1/2 x k x e2 or Ee = 1/2ke2
Elastic energy(J) = 0.5 x spring constant(N/m) x extension (m) squared
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P= E/T or P= W/T
Power(W)= Energy Transferred(J)/Time(s) or Power(W)= Work done(J)/Time(s)
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W = F x D
Work done = Force x Distance
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Efficiency=Useful output energy transfer/ Total input energy transfer
Efficiency= Useful power output/ Total power input
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## Other cards in this set

### Card 2

#### Front

GPE (J)= mass(kg) x gravitational field strength(N/kg) x height(m)

#### Back

Ep = m x g x h or Ep = mgh

### Card 3

#### Front

Elastic energy(J) = 0.5 x spring constant(N/m) x extension (m) squared

### Card 4

#### Front

Power(W)= Energy Transferred(J)/Time(s) or Power(W)= Work done(J)/Time(s)

### Card 5

#### Front

Work done = Force x Distance

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