Sally asked in Science & MathematicsPhysics · 4 months ago

physics help plz?

If a 70 kg person climbs a 3 m flight of stairs at constant speed, their work done while climbing is:

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  • oubaas
    Lv 7
    4 months ago

    work W = gained GPE = m*g*ΔH = 70*9.807*(3-0) = 2 kjoule (just 1 sign. figure)

  • 4 months ago

    By work energy relation,

    =>W = ΔPE

    =>W = mgΔh

    =>W = 70 x 9.8 x 3

    =>W = 2058 J

  • 4 months ago

    W = mgh

    W = 70(9,81)(3) = 2060,10 J

    Review it!

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