1. Force of Impact: This is the force the ball exerts on the wall, and by Newton's Third Law, the equal and opposite force the wall exerts back on the ball. This is what causes the ball to change direction and possibly deform momentarily.

2. Normal Force: This is the force the wall exerts on the ball, perpendicular to the surface of the wall. It prevents the ball from passing through the wall.

Let me know if you'd like a more detailed explanation of either of these forces!