Answer Wiki. 3 Answers. Rishabh Jain, Football, EDM and Physics define me. Answered Mar 14, 2016. 'F=dp/dt'.....(1) 'v=ds/dt'.....(2) Now, W=F.s. Using (1) and (2), W= (dp/dt).ds => dp. (ds/dt) => 'W= dp.dv' or simply, 'W= P.v' ie. Momentum × velocity. read more
Nevertheless, we do know that momentum will be conserved anyway, so if, for example, the two objects stick together, and no bits fly off, we can find their final velocity just from momentum conservation, without knowing any details of the collision. read more