ch7 problem10

# Physics: Principles with Applications

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Chapter 7, Problem 10 Question Problem Let be the mass of the empty railroad car and let be its velocity. Let be the mass of the railroad car after 90 minutes and let be its velocity. Find the initial total momentum of the empty railroad car. Find the final momentum of the railroad car. Since no external force acts on the system, the total momentum is conserved. Solve for . First we have to find the mass of the snow that has occupied the car in 90 minutes. It is given that
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Unformatted text preview: the snow fills the car at a rate of . Find the mass of snow that has occupied the car in 90 minutes. The mass of the car after 90 minutes is the sum of the mass of the empty car and the mass of snow accumulated. Rewrite the equation for . Substitute 3800 kg for , 315 kg for , and for . Find . Thus, the speed of the railroad car after 90 minutes is . [2/4/2008 4:44:48 PM]...
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