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1.7 Energy, work and power

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Question 20

Which two physical quantities can be used to calculate the power developed by a crane lifting a heavy container vertically at a constant velocity?

A

The weight of the container and the velocity at which it is lifted

B

The weight of the container and the vertical height it is lifted only

C

The work done on the container and the vertical height it is lifted only

D

The force exerted on the container and the time taken only

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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