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1.2 Conservation and dissipation of energy

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Question 12

A motorised conveyor belt moves packages. Its roller bearings are oiled, and it is then operated to transfer the same amount of energy usefully to the packages as it did before. No other change is made.

Which statement describes how the conveyor belt's total input energy transfer and efficiency change?

[1]
A

the total input energy transfer stays the same and the efficiency increases

B

the total input energy transfer increases and the efficiency decreases

C

the total input energy transfer decreases and the efficiency decreases

D

the total input energy transfer decreases and the efficiency increases

Markscheme

1.2 Conservation and dissipation of energy Questions

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

104 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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