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kiruha [24]
3 years ago
10

Steve does 80 J of work to a rope threaded through a pulley and attached to a crate of anvils. The tension of the rope is 10 N a

nd the crate rises 4 m while Steve pulls. What is the efficiency of the pulley? [Hint: how much work was done on the crate?]
a) (A) 0.07 or 7 %
b) (B) 0.2 or 20 %
c) (C) 0.5 or 50 %
d) (D) 1 or 100 %
Physics
2 answers:
Ivahew [28]3 years ago
6 0

Answer:

The Answer is (B)

Explanation:

zimovet [89]3 years ago
5 0
The answer would be letter b
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