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1.7 Energy, work and power

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Question 3

The table shows the mass of a load and the time taken by four different lifts, A, B, C, and D, to lift their loads to the same height.

LiftMass of load / kg\text{kg}kgTime / s\text{s}s
A12012
B12020
C24012
D24020

Which lift develops the greatest average power?

A

A

B

B

C

C

D

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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