Hello,

Can anyone please show me how to rearrange the following formula makingmthe subject.

J = mv - mu

I am stuck before I start! You can't divide both sides by v, and you can't divide both sides by u (cuz that would make it worse!)

anyways the answer should be J / v-u , which takes me to the other doubt.

of you divide mv-mu by v-u (mv-mu/v-u), cancel out the v and u's giving m-m=0 (or is it m+m=2m?) either way it isn't m ...

Thanks in advance