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Homework Help: Physics

Posted by john daniel on Saturday, December 1, 2012 at 10:58am.

a tennis ball is thrown vertically upward from the ground and the student gazing out of the window sees it moving upward pass him at 5 m/sec. the window is 10 m above the ground. how high does the ball go above the ground

• Physics - Henry, Monday, December 3, 2012 at 6:20pm

  V^2 = Vo^2 + 2g*d = 5^2 = 25
  Vo^2 - 19.6*10 = 25
  Vo^2 = 25 + 196 = 221
  Vo = 14.87 m/s.
  
  d = (V^2-Vo^2)/2g.
  d = (0-221)/-19.6 = 11.28 m.
  

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