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1.7 Energy, work and power

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Question 356

Four hikers of equal weight start at the level of a lake and climb to a scenic lookout platform at the top of a cliff. Each hiker takes a different route to reach the platform. The routes and the times taken by each hiker are described below:

  • Hiker A: runs up a direct flight of stairs in 12 s
  • Hiker B: walks up a long, gentle ramp in 25 s
  • Hiker C: climbs a vertical ladder in 18 s
  • Hiker D: jogs up a winding dirt path in 15 s

Which hiker develops the greatest average power against gravity during the climb?

A

Hiker A

B

Hiker B

C

Hiker C

D

Hiker D

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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