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Will tosses a ball straight upward. Show that if the ball is tossed upward at 18m/s it will be in the air for less than 4s.

  • physics -

    Use the height formula.

    hf=hi+vo*t-1/2 g t^2 solve for t, you knw hf=hi=0

  • physics -

    is there another formula that can be used? I haven't learned that one. Can it be the initial velocity/2

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