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At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.3 m/s2. At the same instant a truck, traveling with a constant speed of 9.4 m/s, overtakes and passes the automobile.
(a) How far beyond the traffic signal will the automobile overtake the truck?
(b) How fast will the car be traveling at that instant?

  • physics -

    at some time t, the same time for both cars, they have went the same distance d.
    You have two equations

    Truck: d=vi*t
    Car: d=1/2 a t^2

    set the equal, solve for t, thensolve for d.

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