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1.7 Energy, work and power

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Question 89

A child on a sled pulls their sled from the bottom of a hill to the top and gains 12 000 J12\,000\text{ J}12000 J of gravitational potential energy.

They then sled down the hill. At the bottom of the hill, their kinetic energy is 3500 J.

How much energy is dissipated to the surroundings in overcoming friction and air resistance as the child sleds down the hill?

A

3500 J3500\text{ J}3500 J

B

8500 J8500\text{ J}8500 J

C

12 000 J12\,000\text{ J}12000 J

D

15 500 J15\,500\text{ J}15500 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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