Physics Question Watts #19?

Question

An ordinary light bulb consumes 40 W of power. Through what height could a 1000-N object be lifted expending the same amount of power for 6 hours?

a. 860 m
b. 360 m
c. 720 m
d. 650 m

Answer 1

First calculate the amount of energy or work this provides. Take the power output and multiply by the specified time, because W = Pt. Then consider that the work done in lifting a weight is mgh, where mg is the weight in newtons and h is the height. Set mgh equal to the work you calculated, and solve for h.

Answer 2

A