(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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?

2. Relevant equations

I'm not totally sure...

3. The attempt at a solution

I have no idea how to even start this. Could someone help me start to solve it, please?

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# Falling Rock Problem

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