Physics Equations Revisions 0.0 / 5 ? PhysicsEnergy Stores and TransfersEnergy ResourcesEnergy EquationsYears 7-9 (KS3)None Created by: dat.girlJennyCreated on: 23-06-21 22:29 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 1 of 6 Ep = m x g x h or Ep = mgh GPE (J)= mass(kg) x gravitational field strength(N/kg) x height(m) 2 of 6 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 3 of 6 P= E/T or P= W/T Power(W)= Energy Transferred(J)/Time(s) or Power(W)= Work done(J)/Time(s) 4 of 6 W = F x D Work done = Force x Distance 5 of 6 Efficiency=Useful output energy transfer/ Total input energy transfer Efficiency= Useful power output/ Total power input 6 of 6
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