Sample_Exam_2 - Name and Discussion Section Number _ ENSC...

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Name and Discussion Section Number ________________________________________ ENSC 2123 Exam 2 Fall 2010 Question 1 (25 Points): The 3kg collar slides along the smooth vertical spiral rod. Determine the tangential force that must be propelling the collar and the normal force between the road and the collar. At ߠൌ radians: ݎ ൌ 3.142 meters, ݎሶൌ8 meters/s, ݎሷൌ0 meters/s 2 , ߠ ൌ4 rad/s and is constant.
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Question 2 (25 Points): Block A weighs 20 pounds, and block B weighs 5 pounds. If block B has an initial downward velocity of 3 feet per second, when ݐൌ0 seconds, determine the distance block B must travel before it momentarily comes to a stop. Note: you must use ENERGY or MOMENTUM to solve this problem. You may NOT use chapter 13 methods.
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Question 3 (25 Points): The ball has a weight of 20lb and is fixed to a rod that has negligible mass. If the ball is released from rest when ߠൌ0 degrees and begins to fall, determine the angle ߠ at which the compressive (normal) force in the rod becomes zero.
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This note was uploaded on 10/12/2011 for the course ENSC 2123 taught by Professor Russell during the Fall '08 term at Oklahoma State.

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Sample_Exam_2 - Name and Discussion Section Number _ ENSC...

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