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March 29, 2017

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At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.85m/s^2. At the same instant a truck, traveling with a constant speed of 19.0m/s, overtakes and passes the car.

A) How far beyond its starting point does the car overtake the truck?

B) How fast is the car traveling when it overtakes the truck?

  • Physics - ,

    a) they both travel the same distance in the same time.
    distancecar=distancetruck
    1/2 * 2.85*t^2=19*t
    solve for t, then solve for either distance.

    b) vf=2.85*t

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