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A mechanic pushes a 2.60 10 3 -kg car from rest to a speed of v , doing 4,680 J of work in the process.

A mechanic pushes a 2.60 10³-kg car from rest to a speed of v, doing 4,680 J of work in the process. During this time, the car moves 21.0 m. Neglecting friction between car and road, find v and the horizontal force exerted on the car.(a) the speed v m/s (b) the horizontal force exerted on the car (Enter the magnitude.)

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