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A person with a mass of 15kg is walking downhill at a velocity of 10 m/s. What is the walker's momentum
The walker's momentum is 150 kg m/s. m=pv m= 15 kg* 10 m/s m= 150 kg m/s
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Asked 7/25/2022 7:07:56 AM
Updated 5/23/2023 5:48:44 AM
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Edited by Sting [5/23/2023 5:48:42 AM]
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The two trains stick together, and the new velocity is 50m/s. What is the mass of the second train
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Updated 7/25/2022 8:19:27 AM
1 Answer/Comment
A 5,000 kg train is traveling at a velocity of 100 m/s and hits another train. The two trains stick together, and the new velocity is 50 m/s. 5,000 kg is the mass of the second train.
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(5000 kg) * (100 m/s) = 500,000 kg·m/s;
((5000+M) kg) * (50 m/s) = 500,000 kg·m/s;
Divide by 50 m/s and subtract 5,000 kg:
(5000 +M) kg = 10,000 kg;
M kg = 5000 kg
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