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A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?
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In a system, when potential energy decreases, then entropy also decreases. true false
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A spring of negligible mass has force constant k = 900 N/m . You place the spring vertically with on...
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