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  • Understanding Equilibrium: What Happens When Forces Balance?
    If the sum of all forces on a ball is zero, it means the ball is in equilibrium. Here's what that means:

    * No Net Force: The forces acting on the ball perfectly cancel each other out. There's no unbalanced force pushing or pulling the ball in any particular direction.

    * Constant Velocity: The ball will either be at rest (not moving) or moving at a constant velocity. This is because a change in velocity (acceleration) requires a net force.

    * Possible Scenarios:

    * Resting on a surface: The force of gravity pulling the ball down is balanced by the normal force from the surface pushing back up.

    * Floating in air: The forces of gravity and buoyancy (air resistance) might be equal and opposite.

    * Moving at a constant speed in a straight line: If the ball is moving, any forces acting on it (like friction) are perfectly balanced by other forces (like a constant applied force).

    Important Note: Equilibrium doesn't necessarily mean the ball is stationary. It means the ball's velocity is not changing. It could be moving at a steady pace in a straight line.

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