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8 Energy – forces doing work

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Question 19

An airport baggage conveyor transfers energy usefully at a constant rate of 375 W. An energy meter records the total energy supplied to the conveyor.

Time in sTotal energy supplied in J
53000
138000

What is the efficiency of the conveyor between 5 s and 13 s?

[1]
A

1.671.671.67

B

0.380.380.38

C

0.600.600.60

D

0.630.630.63

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8 Energy – forces doing work Questions

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

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