Question

how can e=1/2mv^2 when 1/2 moved to the side of e become 2e? This is because you are trying to find the formula when solved for v.

Answer 1

e = 1/2 mv ^2

Times 2 for both sides.

2e = mv^2

And this is because you are trying to find the formula when solved for v.

And I can help you find that formula which is:

mv^2 = 2e

v^2 = 2e/m

v = √(2e/m)