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Posted by on Sunday, January 23, 2011 at 4:15pm.

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

  • Physics - , Tuesday, January 25, 2011 at 7:47pm

    When h = hmax, Vf = 0,
    Vf = Vi + gt = 0,
    27 - 9.8t = 0,
    -9.8t = -27,
    t(up) = -27 / -9.8 = 2.76s,
    t(tot.) = 2 * 2.76 = 5.52s.

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