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3 Conservation of energy

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Question 83
F

A battery operates a motor that raises a load. The table shows the energy changes during one lift. The load starts and finishes at rest.

Energy changeEnergy in J\mathrm{J}J
Decrease in the battery's chemical store500
Increase in the load–Earth gravitational store320
Increase in thermal stores of motor and wires120

How much energy is transferred to the surroundings in addition to the changes listed?

[1]
A

60 J60\ \mathrm{J}60 J

B

180 J180\ \mathrm{J}180 J

C

300 J300\ \mathrm{J}300 J

D

940 J940\ \mathrm{J}940 J

Markscheme

3 Conservation of energy Questions

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

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