A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2016 · Q171 Mark

The pump of a water pumping system uses 2.0 kW of electrical power when raising water. The pumping system lifts 16 kg of water per second through a vertical height of 7.0 m. What is the efficiency of the pumping system?

A1.8%

B5.6%

C22%

D55%

✓ Correct answer

D: 55%

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2016 Paper 1 Variant 2, question 17.

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