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1.7 Energy, work and power

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Question 91

Two water pumps, Pump A and Pump B, lift the exact same volume of water from a low reservoir up to the same elevated holding tank.

Pump A takes 5.0 minutes5.0\text{ minutes}5.0 minutes to complete the task. Pump B takes 8.0 minutes8.0\text{ minutes}8.0 minutes to complete the task.

Which statement about the pumps is correct?

A

Pump A performs more useful work than Pump B.

B

Pump A develops less useful power than Pump B.

C

Pump A performs less useful work than Pump B.

D

Pump A develops more useful power than Pump B.

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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