Question

An electric motor creates a tension of 4500 N in a hoisting cable and reels it at a rate of 2 m/s. Calculate the power of the motor.

Answer 1

power = force X velocity

power = 9000 watt

Answer 2

Power (P) = Energy used (E) / time period (t)

P=E/t

We know that

E= Force(F) * Displacement(s)

So, P= F*s/t

We know that

Velocity(v) = displacement (s)/time(t)

Using this

→ P=Fv

→ P= 4500N * 2m/s

P= 9000Watts = 9KW