Physics

To find the average braking force, we can use the work-energy theorem, which states that the work done by the braking force is equal to the change in kinetic energy.

 

Calculate the initial kinetic energy

The initial kinetic energy of the car is given by:

 

Where:

(mass of the car),

(initial velocity of the car).

 

 

Final kinetic energy

Since the car comes to rest, the final kinetic energy is zero:

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