Question

The useful power output from the motor is 1.5 kW

Calculate the time it takes for the motor to transfer 450 000 J of useful energy.

Answer 1

t = 300 seconds

Step-by-step explanation:

Given that,

The power output of the motor, P = 1.5 kW

Energy transferred = 450 000 J

Power is given by work done per unit time. So,

`P=(W)/(t)\\\\t=(W)/(P)\\\\t=(450 000)/(1.5* 10^3)\\\\t=300\ s`

So, it will take 300 seconds for the motor.