Physics · Laws of Motion

Two billiard balls of equal mass 30 g strike a rigid wall with the same speed of 108 km/h but at different angles. Ball 'a' strikes the wall normally and ball 'b' strikes at an angle of 45° with the normal. If both balls get reflected with the same speed, then the ratio of the magnitude of impulses imparted to ball 'a' and ball 'b' by the wall along the X-direction (normal to the wall) is: