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A person who weigh 500N climbs a flight of straight from the ground to the 4th floor of a building in 40sec. If the height of 4th is 10m find
A... power in watts
b.....power in Hp


    1 watt = 1 joule/s = 1 N-m/s = 1 kg-m²/s&su3;

    weight,w=500N (=mg)
    t=40 sec.
    power = Nm/s = wh/t watts

    1 horsepower = 745.7 watts

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