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8.3 Power and efficiency

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Question 67
H

A motor receives 800 W for 15 s. It pulls a crate 10 m with a constant force of 600 N in the direction of motion. What is the mean power dissipated in the motor during this time?

[1]
A

600 W600\ \mathrm{W}600 W

B

400 W400\ \mathrm{W}400 W

C

200 W200\ \mathrm{W}200 W

D

800 W800\ \mathrm{W}800 W

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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