Ball (A) which has mass = m moves along a frictionless horizontal table with velocity

(7i+ 5j) it collides with another ball (B) of mass = 4m its velocity is (3i+ 3j). Coefficient of restitution is e between the balls. Assume that the common normal at the impact point is theiaxis. The balls can be modelled as particles and ignore rotation of the balls.

a) Give 4 eqns relating the velocities of A&B after the collision

b) Determine theses velocities after the collision in terms of the cartesian vectorsi&j and e.

c) Why cant the velocity of B after the collison be in theidirection only? Explain?

Thanks ACU