physics
posted by mb .
A student atands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0 m above flat, horizontal beach. With what speed of impact does the stone land?

What is the initial KE? What is the initial PE?
FinalKE=intialPE+initialKE 
how does that help mee???
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