Question

despejar v de:
f=1/2mv2

Answer 1

$f= \frac{1}{2}m v^{2} \\ \\ f= \frac{m v^{2} }{2} \\ \\ 2f=m v^{2} \\ \\ \frac{2f}{m}= v^{2} \\ \\ \sqrt{ \frac{2f}{m} }=v \\ \\ v= \sqrt{ \frac{2f}{m} }$