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8.3 Power and efficiency

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Question 17

At a construction site, pulley system X raises a 20 kg bucket of mortar through a vertical height of 6.0 m in 12 s. Pulley system Y raises a 30 kg bucket through a vertical height of 4.0 m in 8.0 s. What is the correct comparison of their mean useful power outputs?

[1]
A

The useful power of Y is greater.

B

The useful power of X is greater.

C

The useful powers cannot be compared from these data.

D

The useful powers of X and Y are equal.

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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