If it takes 726 W of power to move a mass 36 m and 14 seconds what is the mass

From that information, I can tell that the force pushing on the mass

averaged (282 and 1/3) newtons during those 24 seconds.

But the information doesn't nail down what the mass must be.

I think it would if we only knew something about the friction.

Either tell us how much friction there is, or tell us that there's

none, and I think I could find the mass.

Power = work / time

work = force * displacement

force = mass * gravity

so:

power = (mass * gravity * displacement) / time

726 = (mass * 9.81 * 36) / 14

726 * 14 = mass * 9.81 * 36

10164 = mass * 353.16

mass = 10164 / 353.16

mass = 28.78 kg