halieghs7280 halieghs7280
  • 11-03-2024
  • Physics
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Jill does 270 joules of work pulling the rope on a pulley to lift a crate. The output work of the pulley is 235 Joules. What is the efficiency of the machine?

a) 87%
b) 82%
c) 78%
d) 88%

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