contestada

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.

Respuesta :

Answer:

t = 300 seconds

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,

[tex]P=\dfrac{W}{t}\\\\t=\dfrac{W}{P}\\\\t=\dfrac{450 000}{1.5\times 10^3}\\\\t=300\ s[/tex]

So, it will take 300 seconds for the motor.