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8 Energy – forces doing work

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Question 63
F

A pump has an input power of 500 W and an efficiency of 60%. It operates for 20 s. How much energy is transferred usefully?

[1]
A

4000 J4000\ \mathrm{J}4000 J

B

16 700 J16\,700\ \mathrm{J}16700 J

C

10 000 J10\,000\ \mathrm{J}10000 J

D

6000 J6000\ \mathrm{J}6000 J

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8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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