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## Homework Statement

A 2kg ball at the top of a 10m well has 0 potential and kinetic energy. The ball then falls to the bottom of the well and stops in the mud. After the ball stops what is the sum of its potential and kinetic energy?

## Homework Equations

PE=m*g*h

KE=(1/2)M*V^2

## The Attempt at a Solution

Ke + Pe = ?

(1/2)*2*0^2 + 2*(-10)*9.8 = -196 J

That is my answer, but my teacher says I'm wrong but cannot give me a reason.

Could someone please work out if I am right or what is the real answer and how you come to it.

Thank you