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8 Energy – forces doing work

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Question 46

During one movement, a motorised theatre curtain receives 54 kJ of energy. It dissipates 18 kJ and has a mean useful power output of 1.2 kW. How long does the movement take?

[1]
A

15 s15\ \mathrm{s}15 s

B

30 s30\ \mathrm{s}30 s

C

45 s45\ \mathrm{s}45 s

D

60 s60\ \mathrm{s}60 s

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8 Energy – forces doing work Questions

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

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