Question 1 Report
The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?
Answer Details
Efficiency = M.A/V.R 75% = M.A/V.R 75/100 = M.A/5 M.A = 75(5)/100 = 3.75
But M.A = Load/Effort3.75 = 150/EffortEffort = 150/3.75Effort = 40N