Power and efficiency

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Question 7
Easy

An electric winch transfers 284 000 J284\,000\text{ J}284000 J of useful mechanical energy to lift a cargo container in a time of 55 s.

An electric winch lifting a cargo container

Calculate the power transferred by the electric winch.

Use the equation:

P=Et P = \frac{E}{t} P=tE​

Give your answer to 2 significant figures.

[3]

Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /Power and efficiency