Consider the case where a basketball rotating about its center of mass strikes a wall head-on. The velocity given it parallel to the wall due to the spin is caused by the friction between the wall and the ball as the ball is sliding against the wall during the collision. Friction is proportional to the normal force acting on a surface. The faster the ball hits the wall, the greater is the normal force, but the time the ball touches the wall is also smaller. Does the linear velocity of the ball have any effect on the total amount of velocity given to the ball parallel to the wall?