Anonymous
Anonymous asked in Science & MathematicsPhysics · 1 month ago

Can someone please help me solve this physics problem (I have a test tomorrow and this is review) ?

An elevator motor provides 45.0 kW of power while lifting a 2000-kg elevator 35.0 m. If the elevator contains six passengers of the same mass and it takes 20.0 s to accomplish this task, determine the mass of each passenger.

Update:

*Anonymous is right*

2 Answers

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  • 1 month ago
    Favorite Answer

    45000 w x 20 s = 900000 J

    E = mgh = 9e5 = m(9.8)(35)

    m = 9e5/(9.8)(35) = 2597 kg

    2597 – 2000 = 597 kg for the passengers

    597 / 3 = 199 kg each

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  • Anonymous
    1 month ago

    The favourite answer is wrong. Please pay attention to your working. 

    Ep=mgh

    45000W= m*9.8m/s^2*35.0m/20.0s

    m= 2.62*10^3kg

    6m2=m-m1

    6m2=2.62*10^3kg*2000kg

    6m2=6.20*10^2kg

    m2=6.20*10^2kg/6

    m2= 1.03*10^2kg

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