Question 805260
determine the maximum height the ball reaches if thrown on Earth. 
h(t)=25t-.5*t^2
gravitational acceleration on Earth is 9.8m/s^2.
If you use 9.8m/sec^2, then
h(t) = -4.9t^2 + 25t, not .5 or 5
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Max ht is at the vertex of the parabola.
t = -b/2a = -25/-9.8
t =~ 2.551 seconds
h(2.551) =~31.888 meters
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slove the same thing but on the moon too. 
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gravitational acceleration on the moon is 1.6m/s^2 
You do that one.