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March 30, 2017

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A boy's hand pushes a ball through a vertical distance of 1.45 m as he throws the ball straight upward. Once the ball leaves his hand it travels an additional 22 m (straight up) before returning to earth. Find the acceleration of the ball while it was in the boy's hand

  • Physics - ,

    You need to find the vertical velocity of the ball at launch.
    The PE at the top=KE at launch
    mg*22=1/2 m v^2
    v= sqrt (2*g*22) m/s

    now, considering just the period throwing
    vf^2=vi^2+2ad
    vf=above
    vi=0
    d=1.45m
    solve for a

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