exam02_samples

exam02_samples - ME 274 Spring 2008 Examination No 1...

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ME 274 – Spring 2008 Name Examination No. 1 PROBLEM NO. 3 Instructor Given : A robotic manipulator is made up of two links OA and ADB as shown in the figure below left. Link OA has a fixed length of L = 4 ft , and the length link ADB is increasing at a constant rate of 6 ft/sec . The orientation angles of links OA and ADB are increasing at constant rates of d " /dt = 2 rad/sec and d # /dt = 3 rad/sec , respectively. Find : For the position shown below right with b = 3 ft , = 0 and = 90°, determine the acceleration of point B on the manipulator. HINT : In solving this problem, use an observer that is attached to AD and with a set of coordinate axes also attached to AD. O A B L b x y D O A B 90° x y D
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ME 274 – Spring 2009 Name Examination No. 2 PROBLEM NO. 2 Given : Concrete block A (having a weight of W A ) is attached to log B (having a weight of W B ) with the cable-pulley system shown. The system is released from rest with log B resting on a rough incline (coefficient of kinetic friction
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This document was uploaded on 12/25/2011.

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exam02_samples - ME 274 Spring 2008 Examination No 1...

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