Solved: In the "before" part of Fig. 9-60, car A (mass
Chapter , Problem 56(choose chapter or problem)
In the "before" part of Fig. 9-60, car A (mass 1100 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1400 kg). Both cars then slide with locked wheels until the frictional force from the slick road (with a low ILk of 0.13) stops them, at disPROBLEMS 235 tances dA = 8.2 m and dB = 6.1 m. What are the speeds of (a) car A and (b) car B at the start of the sliding, just after the collision? (c) Assuming that linear momentum is conserved during the collision, find the speed of car B just before the collision. (d) Explain why this assumption may be invalid.
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