Hi, I am stuck on a physics question. I can do the first part but my equations don't seem to work in part B. All help will be appreciated. BTW, use the hints they help a lot .
The url for the question: https://goo.gl/dCWPQ5

Hi, I am stuck on a physics question. I can do the first part but my equations don't seem to work in part B. All help will be appreciated. BTW, use the hints they help a lot .
The url for the question: https://goo.gl/dCWPQ5

Might've been quicker to find a general solution for velocity. You get something like this after a bit of algebra, v_B=(2m)v_A/(m+2m) and similarly for v_C=2(2m)v_B/(2m+3m).