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1.7 Energy, work and power

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Question 62

An electric motor does 580 000 J580\,000\text{ J}580000 J of work to hoist a load to the top of a construction site. It takes 8 minutes8\text{ minutes}8 minutes to complete this task.

What is the power of the motor?

A

1.2 kW1.2\text{ kW}1.2 kW

B

73 kW73\text{ kW}73 kW

C

4600 kW4600\text{ kW}4600 kW

D

280 000 kW280\,000\text{ kW}280000 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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