Physics

To find the final velocity of the car, we can use the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy:

 

Calculate the initial kinetic energy

The car's initial speed is . The initial kinetic energy is:

 

Given:

,

,

 

 

The work done on the car is . The work-energy theorem tells us that the work done is the change in kinetic energy:

 

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