Physics

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During a baseball game, a batter hits a
pop-up to a fielder 82 m away.
The acceleration of gravity is 9.8 m/s2 .
If the ball remains in the air for 6.9 s, how
high does it rise?
Answer in units of m.

  • Physics -

    goes up for 6.9/2 = 3.45 seconds
    initial speed up = Vi
    v = Vi - 9.8 t
    at top, v = 0
    0 = Vi - 9.8 (3.45)
    Vi = 33.8 m/s

    h = Vi t - 4.9 t^2
    = 33.8(3.45) - 4.9(3.45^2)
    = 116.6 - 58.3
    =58.3 meters
    note, the horizontal proble, the 82 m range, has nothing to do with the problem so far.

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