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1.7 Energy, work and power

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Question 113

A cyclist rides to the top of a hill and gains 18,000 J18,000\text{ J}18,000 J of gravitational potential energy.

The cyclist then coasts down the hill without pedaling. At the bottom of the hill, their kinetic energy is 5,000 J5,000\text{ J}5,000 J.

How much energy is dissipated in overcoming friction and air resistance as the cyclist coasts down the hill?

A

5,000 J5,000\text{ J}5,000 J

B

13,000 J13,000\text{ J}13,000 J

C

18,000 J18,000\text{ J}18,000 J

D

23,000 J23,000\text{ J}23,000 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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