Question

an electric motor is used to raise an object. the object gains 60J of gravitational potential energy when the moter is supplied with 200J of energy. Calculate the percentage efficiency of the moter? plz answer​

Answer 1

Answer:

30%

Explanation:

Since the equation for this is, Effiency = power out/power in x 100, we know that 200J is the power in as it's being supplied with it. 60J is the power out as it gets the output power from the motor. So we solve it like this:

E = 60/200 x 100

E = 30%

So there you go.