college physics

a woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210m from the deer. if the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?

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  1. V^2 = Vo^2 + 2a*d.
    a = (V^2-Vo^2)/2d
    a = (0-(23)^2)/420 = 1.26 m/s^2.

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