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Erica kicks a soccer ball 12 m/s at horizontally from the edge of the roof of a building which is 30.0 m high.
a. When does it strike the ground?
b. With what velocity does the ball strike the ground?

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Nakisa

  1. Horizontal component doesn't effect the rate at which it falls, and we will treat up as positive
    x=x(orignial)+v(original)t+0.5at^2
    -30=0.5(-9.8)t^2
    t=2.47s
    v(final)=v(original)+at
    v(final)=at
    v=(-9.8)(2.47)
    v=-24.2m/s

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