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1.7 Energy, work and power

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Question 1

A machine performs work over a certain period of time.

Which set of changes will definitely increase the power developed by the machine?

A

Work done decreases, time taken decreases

B

Work done decreases, time taken increases

C

Work done increases, time taken decreases

D

Work done stays the same, time taken increases

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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