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1.7 Energy, work and power

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Question 275

Which two physical quantities must be used to calculate the average power developed by an electric motor lifting a heavy load?

A

the force exerted on the load and the distance it is lifted only

B

the force exerted on the load and the time taken only

C

the work done on the load and the distance it is lifted only

D

the work done on the load 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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