Physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 23 m/s. The cliff is h = 54 m above the water's surface. How long does it take for the stone to fall to the water?

With what speed does it strike the water?

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  1. If the initial velocity is horizontal, it has not influence on the time of fall.
    Time of fall is determined by the height, and by gravity.

    h=1/2 g t^2
    solve for t, time.

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    bobpursley
  2. Thank you.

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  3. How would I calculate the speed?

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  4. the vertical speed is
    vf= g *time

    the horizontal speed is the kicking speed.

    Vftotal=sqrt (Vh^2+ Vvf^2)

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    bobpursley

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