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1.2 Conservation and dissipation of energy

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Question 4
H

An electric motor is used to lift bricks on a building site. The useful output energy transfer of the motor is 4800 J. The efficiency of the motor is 0.60.

a.

Calculate the total input energy transfer to the motor.

[3]
b.

Calculate the energy dissipated by the motor.

[1]
c.

Describe two ways of increasing the efficiency of the motor.

[2]
Markscheme

1.2 Conservation and dissipation of energy Questions

  1. GCSE
  2. /Physics
  3. /1.2 Conservation and dissipation of energy

40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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