Px = px mv1 +0 = mv cos 0 + mv cos v = v cos + v2 cos Py = py 0+0= mv sin 0 mv sin 0 = v sin 0 - v sin (L5.1) (L5.2) s (m) cancels out. Note that Equations L5.1 and L5.2 are always valid, hether the collision is elastic or inelastic. s elastic, the total kinetic energy of the system is conserved, and the on is also satisfied || mv + 0 = 1 mv + 1mv v = v + v (L5.3) ations L5.1, L5.2, and L5.3 simultaneously, the following relations are Chapter 8, Problem 45) 0+4 = 90 v = v cos 0 = v sin (L5.4) (L5.5) (L5.6)