Question

Calculate the height through which a crane can lift a load of 4t,when it's motor of4hp operates for 10s.
[g=10ms-2]​

Answer 1

h = 2 t = 10s

mass = m = At = 4 x 1000 = 4000kg

force F = mg = 4000 x 10N

work done = F x h = 4000 x 10h

Power = 4HP = 4 x 750w