Physics

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If an object is thrown in an upward direction from the top of a building 1.60 x 102 ft. high at an initial velocity of 21.82 mi/h, what is its final velocity when it hits the ground? (Disregard wind resistance. Round answer to nearest whole number and do not reflect negative direction in your answer.)

I guessed 96 ft/s, would someone please show me what equation to use as well as the answer so I can understand how to do it? Please and thank you

  • Physics -

    You guessed? That is a silly thing to do.

    vf^2=vi^2+2ah

    a=-9.8m/s^2 h=-1.60E2

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