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3 Conservation of energy

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Question 92
H

A motor transfers energy to a pump. The motor is 80% efficient. The pump transfers 75% of the energy it receives into the useful energy store of the water.

The motor receives 2400 J.

How much energy is dissipated by the motor and pump in total?

[1]
A

480 J480\ \mathrm{J}480 J

B

1080 J1080\ \mathrm{J}1080 J

C

1440 J1440\ \mathrm{J}1440 J

D

960 J960\ \mathrm{J}960 J

Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

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