Forces at Play:
* Gravity: This is the primary force pulling the ball downwards.
* Air Resistance: The air pushes against the ball as it moves, slowing it down.
* Normal Force: When the ball hits the ground, the ground exerts an upward force on the ball.
* Elastic Force: The ball itself deforms upon impact, storing energy, and then rebounds due to its elastic properties.
Why Unbalanced:
* During the Fall: Gravity is the dominant force, causing the ball to accelerate downwards. Air resistance works in the opposite direction but is typically weaker than gravity, resulting in a net downward force.
* During the Bounce: When the ball hits the ground, the normal force from the ground is greater than the force of gravity. This upward force causes the ball to slow down and then rebound.
* During the Ascent: After bouncing, gravity pulls the ball downwards again, but the upward momentum from the bounce initially slows the ball's descent. The ball eventually reaches its peak height, where it momentarily stops before falling back down.
Important Note: The forces are constantly changing during the entire bounce. The magnitude and direction of the forces vary depending on the ball's position and velocity.
Key Takeaway: The forces acting on a bouncing ball are rarely balanced throughout the entire process. This is why the ball moves, changes direction, and eventually stops bouncing.
