caculate the number of revolutions of the shaft required to raise a load through 1.2m.
Diameter of the shaft=10.0m
mass of the load=0.5kg
time taken to raise the load through 1.2m=5.0s
assuming that the thickness of the thread can be ignored and that the gravitational force acting on a mass of 1kg is 10.0N.
(2)the speed of rotation of the output shaft in revolutions per second.