212120total0112(/2)12ppprrrprpvvDvadDxdttttttavavvDdt−−−Δ −=++=+ +=+ +−=++72. (a) A constant velocity is equal to the ratio of displacement to elapsed time. Thus, for the vehicle to be traveling at a constant speed pvover a distance 23D, the time delay should be 23/.ptDv=(b) The time required for the car to accelerate from rest to a cruising speed pvis 0/ptva=. During this time interval, the distance traveled is
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