Question

The power of a motor is 40kW.At what speed can the motor raise a load of 20,000 N?

Answer 1

Power = 40 kW =40×1000=40000 W ,
Force = 20,000 N
As, Power= force x velocity
∴ 40,000 = 20,000 x v
⇒ v = 40,000/ 20,000
⇒ v = 2 m/s
Therefore at the speed of 2 m/s speed can raise a loud of 20,000 N.