Question

56 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 fric- tional force from the slick road (with a low 쌔 of 0.13) stops them, at distances dA 8.2 m and dg6.1 m. What are the speeds of (a) car A and (b) car B at the start of the sliding, just after the colli- sion? (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. Vo Before After Figure 9-60 Problem 56.
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27 5) CAAR B

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