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March 26, 2017

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7. A cat pushes a ball from a 7.00 m high window, giving it a horizontal velocity of 0.20 m/s. How far from the base of the building does the ball land?
(Assume no air resistance and that ay= g = 9.81 m/s2.)

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    H=gt²/2
    t=sqrt(2H/g) = sqrt(2•7/9.81)=1.2 s.
    x=v(x) •t =0.2•1.2 =2.4 m

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