Answer:
See below
Explanation:
At the rope end where Cliff is :
W = f x d
100 N * 18 = 1800 J of work input
13.) At the weight end
work done = f x d
= 500 N * 3 m = 1500 J of work output
Cliff only got 1500 J of work OUTPUT with 1800 J of work INPUT
1500 / 1800 = 83.33 efficiency
