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1.7 Energy, work and power

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Question 379

A cyclist climbs to the top of a hill, gaining 24 000 J24\,000\text{ J}24000 J of gravitational potential energy. She then freewheels down the hill. At the bottom of the hill, her kinetic energy is 9 000 J9\,000\text{ J}9000 J. How much energy is dissipated in overcoming friction and air resistance during the descent?

A

9 000 J9\,000\text{ J}9000 J

B

15 000 J15\,000\text{ J}15000 J

C

24 000 J24\,000\text{ J}24000 J

D

33 000 J33\,000\text{ J}33000 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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