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MCG 2108 Mechanics II FINAL EXAMINATION- (Questions and Answers)

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MCG 2108 Mechanics II FINAL EXAMINATION Length of Examination: 3 hours December 09, 2011 Professor: Natalie Baddour Page 1 of 5 Family Name: _________________________________________________ Oth ... er Names: _________________________________________________ Student Number: ___________ Signature ____________________________ Closed book. If you do not understand a question, clearly state an assumption and proceed. Only non-programmable calculators are allowed. Marks are given for diagrams, so draw clear diagrams! There are FIVE questions. All questions carry equal weight. At the end of the exam, when time is up: - Stop working and turn your exam upside down. - Remain silent. - Do not move or speak until all exams have been picked up, and a TA or the Professor gives the goahead to leave. MCG 2108 Page 2 of 5 Question 1 Crank AB rotates about point A with a constant angular velocity of 900 rpm clockwise. Consider the instant when θ = 60° and determine: a) the angular velocity of link BD, b) the angular acceleration of link BD, c) the acceleration of the piston P. ANSWERS: ωBD=16.5 rad/s CCW, αBD=2613.67 rad/s2 CW. Question 2 A uniform rod of length L and mass m is supported as shown. The mass m has weight mg = 8 N, and L = 75cm. Knowing that the cable AD suddenly breaks, determine at this instant a) the angular acceleration of the rod AB, b) the tensions in the cables AE and BF. [Show More]

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