sample2_extra_exam

# sample2_extra_exam - An older sample exam 2 with more of an...

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An older sample exam 2 with more of an even distribution of problems You will find actual numbers here, because this is the format of the test for that particular semester. Still, this semester, Spring 2004, no number calculations will be required. #1 The shank of the vertical plunger of weight W1 (=5-lb) (marked P ) occupies the dashed position when resting in equilibrium against the spring of stiffness k . (In this position it rests d1 (= 0.25 in). above the button A. The upper end of the spring is welded to the plunger, and the lower end is welded to the base plate. If the plunger is lifter d2 (=1.5 in). above its equilibrium position and released from rest, calculate its velocity v just before it strikes the button A. Friction is negligible. (20 points) #2 Consider again the physical situation in problem 1. The button is welded to a base, and together they are much more massive than the plunger. If the coefficient of restitution is e (= 0.8), what is the speed of the plunger just after it has hit the button? (10 points) If you have not

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