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1.7 Energy, work and power

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Question 235

An electric hoist in a factory lifts heavy steel components. The useful work done by the hoist is 3600 kJ in a time of 150 s.

What is the useful output power of the hoist?

A

0.042 kW0.042\text{ kW}0.042 kW

B

24 W24\text{ W}24 W

C

24 kW24\text{ kW}24 kW

D

540 kW540\text{ kW}540 kW

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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