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

Question

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] · Answer 1 · 2022-05-16T15:20:54+03:00

Ivahew [28]3 years ago

6 0

Answer:

The Answer is (B)

Explanation:

zimovet [89] · Answer 2 · 2022-05-16T16:21:29+03:00

zimovet [89]3 years ago

5 0

The answer would be letter b