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8 Energy – forces doing work

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Question 15

A Sankey diagram is drawn for a small electric motor lifting a load. It has one input arrow and two output branches.

The branch for energy transferred to the gravitational potential energy store of the load and Earth is 6 mm wide and represents 90 J. The second output branch is 14 mm wide.

What energy is represented by the input arrow?

[1]
A

210 J210\ \mathrm{J}210 J

B

90 J90\ \mathrm{J}90 J

C

1800 J1800\ \mathrm{J}1800 J

D

300 J300\ \mathrm{J}300 J

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8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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