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1.7 Energy, work and power

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Question 418

An electric motor lifts a load vertically using a pulley. Which two quantities can be used to calculate the useful power output of the motor?

A

the weight of the load and the time taken only

B

the weight of the load and the vertical height lifted only

C

the work done on the load and the time taken only

D

the work done on the load and the vertical height lifted 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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