A construction crane lifts loads vertically at a constant speed of using a motor…
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A construction crane lifts loads vertically at a constant speed of 0.50m s−1 using a motor rated at 5.0kW.
(i) Calculate the tension in the lifting cable while a load is being raised at the stated speed.
(ii) Hence determine the maximum mass of the load that can be lifted at this speed. Take g=9.8m s−2.
(iii) If the operator wishes to raise the same maximum mass at a speed of 0.75m s−1, what minimum motor power (in kW) would be required?