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8 Energy – forces doing work

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Question 88
H

A motor raises a 24 kg load through 2.5 m in 8.0 s. Its efficiency is 0.60. Gravitational field strength is 10 N/kg. What is its mean input power?

[1]
A

1000 W1000\ \mathrm{W}1000 W

B

45 W45\ \mathrm{W}45 W

C

125 W125\ \mathrm{W}125 W

D

75 W75\ \mathrm{W}75 W

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8 Energy – forces doing work Questions

  1. GCSE
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