Question

Rahul kicks a football with a lot of force. The ball rolls for some time and then
stops on its own. Can you explain why?​

Answer 1

When you roll a ball on the ground, the electrons in the atoms on the surface of the ground push against the electrons in the atoms on the surface of your ball that is touching the ground. A rolling ball stops because the surface on which it rolls resists its motion. A rolling ball stops because of friction.

Answer 2

The simple act of kicking a ball involves many concepts of Physics that govern our day-to-day life.

• When Rahul kicks the ball, he transfers kinetic energy to it. This causes the ball to overcome its state of rest and start rolling
• As the ball continues to roll, it is acted upon by several external forces that tend to oppose its state of motion
• The ground that the ball is rolling on exerts a force of friction. This friction force is inherent to the material that the floor is made of. This force is exerted in the opposite direction to that of the motion, leading to the slowing of the ball
• The ball is also under the effects of air resistance
• All these forces eventually succeed in stopping the ball

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