Physics, 05.11.2021 14:00 hollicious1384
A 3.50kN piano is lifted by 3 workers at a constant speed to an apartment 25.0m above the street, using a pulley system fastened to the roof of the building. Each worker can deliver 165 W of power, and the pulley system is 75% efficient. Neglecting the mass of the pulley and ropes, find the time for the workers to lift the piano from the street to the apartment window.
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A 3.50kN piano is lifted by 3 workers at a constant speed to an apartment 25.0m above the street, us...
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