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1.7 Energy, work and power

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Question 321

A warehouse worker needs to lift a heavy barrel onto a storage rack.

Which action involves the worker doing the least amount of work against gravity?

A

lifting the barrel quickly to the upper rack

B

lifting the barrel slowly to the upper rack

C

lifting the barrel to the lower rack first, and then lifting it up to the upper rack

D

lifting the barrel to the lower rack instead of the upper rack

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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