The wall exerts a constant force on the ball through contact forces, such as friction and normal force. When the ball hits the wall, the wall exerts a normal force perpendicular to the surface of the wall, and a frictional force parallel to the surface. These forces act together to keep the ball in contact with the wall and exert a constant force on it.
The magnitude of the constant force exerted by the wall depends on the speed and mass of the ball, as well as the material and surface properties of both the ball and the wall. The angle at which the ball hits the wall can also affect the magnitude of the force.
In an ideal scenario, where there is no air resistance or other external forces, the force exerted by the wall on the ball would remain constant. However, in real-world situations, the force may vary slightly due to factors such as air resistance or imperfections in the surface of the wall.
The constant force exerted by the wall causes the ball to accelerate in the direction of the force. This acceleration can be calculated using Newton's second law of motion, which states that the force exerted on an object is equal to its mass multiplied by its acceleration.
The constant force exerted by the wall can be changed by altering the factors that affect its magnitude, such as the speed and mass of the ball. Additionally, changing the angle at which the ball hits the wall can also change the magnitude and direction of the force exerted by the wall on the ball.