With the 210-lb cylindrical part P in its grip, the robotic arm pivots about O through the range -45∘≤θ≤45∘ with the angle at A locked at 120°. Determine and plot (as a function of θ) the moment at O due to the combined effects of the 210-lb part P, the 110-lb weight of member OA (mass center at G1), and the 45-lb weight of member AB (mass center at G2). The end grip is included as a part of member AB. The lengths L1 and L2 are 3.1 ft and 2.2 ft, respectively. What is the maximum absolute value of MO and at what value of θ does this maximum occur? The moment is positive if counterclockwise, negative if clockwise. After you have the plot, answer the questions.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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With the 210-lb cylindrical part P in its grip, the robotic arm pivots about O through the range -45∘≤θ≤45∘ with the angle at A locked at 120°. Determine and plot (as a function of θ) the moment at O due to the combined effects of the 210-lb part P, the 110-lb weight of member OA (mass center at G1), and the 45-lb weight of member AB (mass center at G2). The end grip is included as a part of member AB. The lengths L1 and L2 are 3.1 ft and 2.2 ft, respectively. What is the maximum absolute value of MO and at what value of θ does this maximum occur? The moment is positive if counterclockwise, negative if clockwise. After you have the plot, answer the questions.
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