- #1
cybernerd
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Homework Statement
A 500g rock is thrown straight down from a bridge and hits the water 5.2 m below. If the rock strikes the water at a speed of 12.5 m/s, what was the initial speed of the rock?
Homework Equations
I'm not totally sure...
The Attempt at a Solution
I have no idea how to even start this. Could someone help me start to solve it, please?