Physics

1. Kinetic Energy of the Ball at the Start:

The initial kinetic energy () of the ball is given by:

 

Where:

(mass of the ball)

(initial speed of the ball)

 

 

2. Work-Energy Principle:

According to the work-energy principle, the work done by the frictional force () is equal to the change in kinetic energy. Since the ball comes to a stop, its final kinetic energy is 0, and all the initial kinetic energy is used to overcome friction:

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