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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