Science and Mathematics for Engineering 6th Edition by John Bird

Exercise 5

A simple machine raises a load of $120 \mathrm {~kg}$ through a distance of $1.2 \mathrm {~m}$ . The effort applied to the machine is $150 \mathrm {~N}$ and moves through a distance of $12 \mathrm {~m}$ . Taking g as $10 \mathrm {~m} / \mathrm { s } ^ { 2 }$ , determine the force ratio, movement ratio and efficiency of the machine.