a 350 kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground the crane that is doing the lifting produces a steady power of 525 watts.- how much time does it take to lift the piano- what is the acceleration of the piano- what is the final speed of the piano
Air Battery Saltwater Battery
learn how batteries work study electricty look up some how things work books in the library a battery needs TWO different materials for the + and - side and a conducting fluid between I think I heard of An aluminum to oxygen in the air system but it obviously is not practical or it would be in wide use Y requires A Question
Let PPower, WWork done, ttime, mmass PW/t, so tW/P (1) But for a given mass (m) traveling through a height (h), W mgh Substituting into (1) gives tmgh/P (as you need) Regarding the acceleration, if the speed is constant, then Regarding the final speed v, well as the speed is constant the final speed the speed throughoutvh/tP/mg Then substitute the numbers.
