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1.7 Energy, work and power

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Question 345

A constant force pulls a sled along a horizontal path. The sled gains 150 J of kinetic energy, and 50 J of thermal energy is produced by friction between the sled and the path. How much work is done by the pulling force?

A

50 J50\text{ J}50 J

B

100 J100\text{ J}100 J

C

150 J150\text{ J}150 J

D

200 J200\text{ J}200 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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