Question

A wheel and axle have radii 80cm and 10cm respectively, if the efficiency of the machine is 0.85, what load will an applied force of 1200N to the wheel raise?

Answer 1

Given

efficiency is e=85

Applied force is F=1200 N

$Efficiency =(M A/V.R)*100$

Here M A is mechanical advantage

V.R= velocity ratio = 80/10

So,.

Efficiency =(M A/V.R)*100

85 = (Load/1200)*(10/80)*100

Load = 8160 N

Hence, the load is 8160 N