Calculate the power spent by a crane while lifting a load of mass 2000 kg, at velocity of 1.5 ms -1 . (g = 10 ms -2 ).

Given,

mass = 2000 kg

velocity = 1.5 ms^-1

weight or downward force = mg = 2000 x 10 = 20,000 N

From formula, P = F x v

P = 20,000 x 1.5 = 30,000 W = 30 kW

Hence, power spent by the crane = 30 kW.