1. The problem statement, all variables and given/known data Two hockey pucks of equal mass undergo a collision on a hockey rink. One puck is initially at rest, while the other is moving with a speed of 5.4 m/s. After the collision, the velocities of the pucks make angles of 33° and 46° relative to the original velocity of the moving puck. Determine the speed of each puck after the collision. V1i=5.4m/s m1=m2 V2i= 0 V1'=? V2'=? 2. Relevant equations P=P' M1V1+M2V2=M1V1'+M2V2' Eki=Ekf 1/2mv1i^2+1/2mv2i^2=1/2mv1'^2+1/2mv2'^2 3. The attempt at a solution k so i understand we have two unknowns and thus we should have two unknown equations. so .. M1V1+M2V2=M1V1'+M2V2' masses equal so they can be cancelled and we know V2=0 so that whole part is removed v1= v1'+v2' 5.4= v1'+v2' 5.4-v1'=v2' ^^ first unknown equation now when i place it into 1/2mv1i^2+1/2mv2i^2=1/2mv1'^2+1/2mv2'^2 it does not give me the right answer or better yet i do not know how to continue on from this i always get 5.4-v2^2=5.4-v2^2+v2'^2 can someone please explain ...thank you in advance.