A 1000 kg automobile is at rest at a traffic signal. At

Chapter , Problem 10

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A 1000 kg automobile is at rest at a traffic signal. At the instant the light turns green, the automobile starts to move with a constant acceleration of 4.0 m/s2 . At the same instant a 2000 kg truck, traveling at a constant speed of 8.0 m/s, overtakes and passes the automobile. (a) How far is the com of the automobiletruck system from the traffic light at t ! 3.0 s? (b) What is the speed of the com then?

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