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limonade
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Homework Statement
If I throw a rock upwards with an initial velocity and throw a rock downwards, what is the speed of the rocks just before they hit the ground?
Homework Equations
The Attempt at a Solution
\They should hit the ground at the same speed and different times. I would use the conservation of mechanical energy, but someone I'm speaking to disagrees with me that they have same speed.
How would you show this mathematically?