Physics - Center of Mass Question with Solution | TestHub

Equal-mass elastic collision: the balls exchange the line-of-centres component; A keeps the tangential part, B moves along the line of centres, and the two final velocities are perpendicular. (A) happens in a head-on hit; (B) also holds in the head-on case (relative velocity reverses, same magnitude). (C): equal speeds at 45° when the tangential and normal components of A's initial velocity are equal -possible. (D): unequal speeds at 30° and 60° (perpendicular directions) - possible. Answer: (A), (B), (C), (D)