I have to re-arrange "E=1/2mv2+mgh" to make the subject "m". The answer given is "m=2E/v2+2gh". I can't get to this answer. My workings are:
E=1/2mv2+mgh.
2E=mv2+2mgh. Multiply both sides by 2.
2E/v2=m+2mgh. Divide both sides by v2.
2E/v2+gh=2m. Divide both sides by gh.
That's the best I can do. Can anyone explain this for me, please?
E=1/2mv2+mgh.
2E=mv2+2mgh. Multiply both sides by 2.
2E/v2=m+2mgh. Divide both sides by v2.
2E/v2+gh=2m. Divide both sides by gh.
That's the best I can do. Can anyone explain this for me, please?