Question

If the power of a motor is 40 kilowatt at what speed can a tree is a load of 20000 newtons

Answer 1

Power = 40 kW = 40,000 W

Force ( weight) =20,000 N

Since, Power = Force X Velocity(Speed)

40,000 = 20,000 X v

v = 40,000 / 20,000 = 2 m/s -1

Therefore,

At a speed of 2 m/s the motor can raise a load of 20,000 N .