Chapter 9 - Center of Mass and Linear Momentum - Problems - Page 254: 84c

The particle that was travelling along the solid green line before the collision, travels in region B after the collision. The particle that was travelling along the solid orange line before the collision, travels in region C after the collision.

If the collision is completely inelastic, then both particles travel along the positive x axis after the collision. If the collision is elastic, then the particle that was travelling along the solid green line before the collision, travels along the dashed orange line after the collision. Therefore, if the collision is inelastic, the particle that was travelling along the solid green line before the collision, travels in the region between the dashed orange line and the positive x axis after the collision. That is, the particle that was travelling along the solid green line before the collision, travels in region B after the collision. If the collision is elastic, then the particle that was travelling along the solid orange line before the collision, travels along the dashed green line after the collision. Therefore, if the collision is inelastic, the particle that was travelling along the solid orange line before the collision, travels in the region between the dashed green line and the positive x axis after the collision. That is, the particle that was travelling along the solid orange line before the collision, travels in region C after the collision.