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8.3 Power and efficiency

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Question 54
H

A hoist has an input power of 1.2 kW and an efficiency of 0.75. It lifts a 180 kg load through a vertical height of 5.0 m at constant speed. Gravitational field strength is 10 N/kg. How long does the lift take?

[1]
A

10 s10\ \mathrm{s}10 s

B

13 s13\ \mathrm{s}13 s

C

5.6 s5.6\ \mathrm{s}5.6 s

D

7.5 s7.5\ \mathrm{s}7.5 s

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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