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1.7 Energy, work and power

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Question 179

Three situations are listed:

  1. A person holding a heavy box at rest while waiting for a delivery
  2. An electric motor hoisting a metal beam to a roof
  3. A compressed spring expanding to launch a toy pinball

In which situations is work being done?

A

1, 2 and 3

B

1 and 2 only

C

2 and 3 only

D

3 only

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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