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physics

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A student drops a ball from the top of a tall building; the ball takes 2.8 s to reach the ground.
1. what was the ball's speed just before hitting the ground?
2. What is the height of the building?

help please?

  • physics -

    assuming it drops from rest you know:
    vo=0
    t=2.8
    a=9.8 (gravity assuming down is +)
    v=?
    use the equation v=vot+at^2

    then you want to find height.
    x= vot+.5at^2

  • physics -

    i love you sweat heart

  • physics -

    Fu

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