Question

if the power of a motor is 40kW at what speed can it raise a load of 20000N

Answer 1

Power = 40 kW = 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. 

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