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1.7 Energy, work and power

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Question 236

A gardener has to lift a heavy bag of compost from the ground onto a raised display. There are two platforms: a low platform and a high platform.

Which action involves the gardener doing the least amount of work?

A

Lifting the bag quickly to the high platform

B

Lifting the bag slowly to the high platform

C

Lifting the bag to the low platform first then lifting it to the high platform

D

Lifting the bag to the low platform instead of to the high platform

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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