# KE-1/2mv^2 physics question

by truckerron1
Tags: ke1 or 2mv2
 Mentor P: 7,318 KE-1/2mv^2 physics question You will find that it is easier to do your algebra BEFORE plugging in the numbers. You have $$\mbox{KE} = \frac 1 2 m v^2$$ then $$2 \mbox{KE} = m v^2$$ then $$2 \frac {\mbox{KE}} m = v^2$$ so $$v = \sqrt { 2 \frac {\mbox{KE}} m }$$ Now you can substitute in your numbers and arrive at the numeric solution.