- #1

jtim36

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## Homework Statement

A ball with mass m projected horizontally o the end of a table with an initial kinetic energy K. At a time t after it leaves the end of the table it has kinetic energy 3K. What is t? Neglect air resistance.

(answer: (2/g)(√K/m)

## Homework Equations

E = 1/2 mv^2

## The Attempt at a Solution

I understand what the problem is asking, but I don't get how to relate time and kinetic energy