Question

I don't understand what this question is asking me to do.

"How long would it take a 7.50kW motor to raise a 500kg piano to an apartment window 10 meters above the ground?"

Answer 1

First find the work needed, which is the change in potential energy, W = m g h.

The find how long it takes, the work divided by the power

time = W(in J)/ (7500 J/s)