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Homework Help: Physical Sciences

Posted by Amanda on Friday, January 25, 2013 at 11:35am.

How do I calculate the initial velocity of a ball if i've only given a maximum height of 12metres above its starting point?

• Physical Sciences - drwls, Friday, January 25, 2013 at 1:13pm

  If H=12 m is as high as it rises, the potential energy there must equal the initial kinetic energy
  
  M g H = (1/2) M V^2
  M cancels out, so
  V = sqrt(2 g H)
  
  g is the acceleration of gravity
  

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