A 9300-kg boxcar traveling at 15.0 m/s strikes a second

Chapter 1, Problem 8P

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QUESTION:

Problem 8P

A 9300-kg boxcar traveling at 15.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car?

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QUESTION:

Problem 8P

A 9300-kg boxcar traveling at 15.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car?

ANSWER:

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From the conservation of momentum, the initial momentum of a boxcar can be equated to final momentum of the system. The momentum can be expressed as,

                                                   

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