Phys211Exam3SampleSolutions

Phys211Exam3SampleSolutions - Physics 211 Exam 3 Sample...

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Unformatted text preview: Physics 211 Exam 3 Sample Problems 1) A 1300 kg car, shown below, runs out of gas while attemptin g to drive to the gas station. What is the minimum speed the car must have in order to make it to the gas station? Assume friction is negligible. A) 17.1 m/s B) 9.9 m/s C) 11.7 m/s D) 6.1 m/s 2) A massless spring hangs vertically from the ceiling. How much does its potential energy increase, if a 23 kg mass is motionlessly attached to it? The spring constant is 3800 N/m. A) 6.7 J B) 8.5 J C) 5.1 J D) 11 J 3) Object A, whose mass is 1 kg, is traveling to the right with a speed 12 m/s, collides head on with the 2 kg object B, which is stationary. After the collision object A rebounds to the left with a speed 4 m/s, and object B moves to the right with speed 8 m/s. Was this collision elastic, or inelastic? A) elastic B) inelastic 4) A 35 kg runner jumps on a 10 kg bobsled, which then slides without friction to the bottom of a 40 m long ramp, compressing a spring whose spring constant is 1800...
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Phys211Exam3SampleSolutions - Physics 211 Exam 3 Sample...

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