Ive been doing good with the Work problems but this one threw in Time and I'm not quite sure how to approach it or what formulas to useA 3x10^2 kg piano is being lifted at a stready speed from ground level stragith up to an apartment 10m above groundThe crane that is doing the lifting produces a steady power of 4x10^2 WHow much time does it take to lift the piano?
PW/t tW/P Fxd/P the force needed is the weight of the piano; the distance is the height of 10m so: tmgh/P 300kgx9.8m/s/sx10m/4x10^2W 73.5 s
