1. The problem statement, all variables and given/known data A travelling at 15m/s in a straight line when it is hit from the left by B. Each has same mass, each assumed to be modelled as a particle, the two coalesce at 65% to original direction of A. a) Suggested alignments for unit vectors are parallel and perpendicular to the direction of coalesced particles, as shown, write momentum of each particle before collision defining any symbols. Trying to find momentum of A before impact with B. False starting over the initial part of this question. A is travelling at 15m/s in a straight line. Picture below is a bit crude. http://imgur.com/ErGAkA5 2. Relevant equations pA= m*u' 3. The attempt at a solution Any help would be much appreciated.