A mechanic pushes a car of mass m, doing work W in making it accelerate from rest.

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A mechanic pushes a car of mass m, doing work W in making it accelerate from rest. Neglecting friction between car and road,
(a) What is the final speed of the car? During this time, the car moves a distance d.
(b) What constant horizontal force did the mechanic exert on the car?
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