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1.2 Conservation and dissipation of energy

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Question 6

The rollers of an automatic warehouse door are normally lubricated. The door is operated after the lubricant has been removed. Which change is expected?

[1]
A

More energy is transferred by heating to the thermal stores of the rollers and the surroundings.

B

More energy is transferred usefully to the kinetic store of the moving door.

C

Less energy is transferred by heating to the thermal stores of the rollers and the surroundings.

D

Some energy is destroyed by friction as the rollers turn and the door moves.

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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