Answer:
KE ÷ (1/2 x m) = V² Which can be rewritten as V² = KE ÷ (1/2 x m)
Explanation:
To make V² the subject we have to get rid of everything other than V² on the right side of the equation. To do this we use simple algbra rules (it is recommended to get familar with algbra in physics).
Since 0.5 (1/2) is times-ed by mass we can undo this by dividing (since divided by is opposide of times and removes it from the right side.
Now on the left side you have KE ÷ (0.5 x m) = V² remember to use brackets pretty much everytime you do an equation in physics that has more than one operation since it's safer.
And finally remember to square root the answer you get since that will be V².
If this isn't very clear (I'm not very good at explaining alebra) I recommend learning more about it since you will have to use algbra in physics a lot. Some scientific calculators also some with solver which can figure out unknowns for you.
