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1.7 Energy, work and power

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Question 123

A cyclist produces an average power output of 80 W as she climbs a hill for 2.5 minutes2.5\text{ minutes}2.5 minutes.

How much useful energy does she expend?

A

0.53 J0.53\text{ J}0.53 J

B

32 J32\text{ J}32 J

C

200 J200\text{ J}200 J

D

12 000 J12\,000\text{ J}12000 J

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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