Question

e=1/2mv^2. solve for m

Answer 1

okay so you need to get rid of the fraction first, by multiplying both sides by 2

Answer 2

next you need to get mass on its own, so divide by v^2

Answer 3

is tha answer m=2e/v^2

Answer 4

nailed it :)

Answer 5

It looks right aswel, think about it. if the mass stays the same and you increase the velocity by 2 times for example, the energy has to increase by 4 times to keep the equation balanced