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3 Conservation of energy

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Question 64

An electric winch raises a piece of stage scenery. The dissipated energy includes all the unwanted energy transfers during one lift.

Energy measurementEnergy / kJ\text{kJ}kJ
supplied to the winch25.0
dissipated during the lift4.5

Calculate the efficiency of the winch.

[3]
Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

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