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Kinematics help

  1. Sep 20, 2009 #1
    A golf ball is released from rest from the top
    of a very tall building. Choose a coordinate
    system whose origin is at the starting point
    of the ball, and whose y axis points vertically
    The acceleration of gravity is 9.8 m/s
    Neglecting air resistance, calculate the ve-
    locity of the ball after 3.99 s. Answer in units
    of m/s. 029 (part 2 of 4) 10.0 points
    What is its speed just before impact with the
    ground? Answer in units of m/s.
    030 (part 3 of 4) 10.0 points
    Now assume the hot air balloon is traveling
    vertically downward at a constant speed of
    4.9 m/s.
  2. jcsd
  3. Sep 21, 2009 #2


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    Last edited by a moderator: Apr 24, 2017
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