Physics

We can solve this using the Work-Energy Theorem, which states that the work done by the forces acting on the car is equal to the change in its kinetic energy.

Determine the initial kinetic energy

The car is initially moving with a speed of , and its mass is . The initial kinetic energy () is given by:

Work done by the braking force

The braking force is . The car comes to a stop, so the final kinetic energy is 0. The work done by the braking force (

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