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Homework Help: Basic Physics Question

  1. Apr 30, 2008 #1
    IF a man jumps off a building that is 90 m high, and gravity is 9.8 m/s, and he weighs 80 kg, then what will his velocity be just as he hits the ground?
     
  2. jcsd
  3. Apr 30, 2008 #2
    just use the equation

    vf^2=vi^2 +2ax
    vf^2=0+2(9.8)(90)
    vf^2=1764
    v=42 m/s

    weight is irrelevant
     
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