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8.3 Power and efficiency

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Question 18

A cliff railway uses an electric drive to raise a carriage of total mass 800 kg through a vertical height of 30 m in 60 s. The mean input power of the drive is 5.0 kW. Gravitational field strength is 10 N/kg. What is the efficiency of the drive?

[1]
A

20%20\%20%

B

125%125\%125%

C

8%8\%8%

D

80%80\%80%

Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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