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8.3 Power and efficiency

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Question 28

A drive system moves a conveyor belt. The drive exerts a steady force on the belt in the direction in which the belt moves.

The table gives data from a test of the drive system.

QuantityValue
input power1.5 kW
steady force800 N
distance moved90 m
time taken75 s

The drive system is suitable only if:

  • its useful power output is at least 1.0 kW
  • its efficiency is at least 0.60.
a.

Calculate the useful power output and the efficiency of the drive system.

[3]
b.

Explain whether the drive system is suitable.

[2]
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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