You can put this solution on YOUR website! When a ball is thrown into the air, what is the formula for that?
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There's "What goes up must come down."
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The height of a ball thrown vertically is
h(t) = -gt^2/2 + v*t + h0
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where g is the gravity of Earth, v is speed at launch and h0 is the height above ground when it's launched.
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