N_-_Rigid_Body_Equilibrium_2-D

# 54 lb n 3968 lb m 106 lb ft example 6 example when

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Unformatted text preview: e two equations yields N = 82.54 lb N = 39.68 lb M = 106 lb-ft EXAMPLE 6 EXAMPLE When holding the 5-lb stone (center of mass at G) in equilibrium, the humorous H, assumed to be smooth, exerts normal forces FC and FA on the radius C and ulna A as shown. Determine these forces and the force FB that the biceps B exerts on the radius for equilibrium. SOLUTION 6 SOLUTION Draw FBD FB FC FA 5 lb 0.8 inch 2 inch 12 inch 75o B 5 lb ΣMB = 0; -5(12) + FA(2) = 0.0; F = 30 lb ΣFY = 0; FB sin75o – 5 – 30 = 0; F = 36.2 lb ΣFX = 0; FC – 36.2 cos75o=0; F = 9.38 lb QUIZ QUIZ When holding the 5-lb stone (center of mass at G) in equilibrium, the humorous H, assumed to be smooth, exerts normal forces FC and FA on the radius C and ulna A as shown. Determine these forces and the force FB that the biceps B exerts on the radius for equilibrium. QUESTION QUESTION What are the required conditions for a rigid body to achieve equilibrium? body A) Σ F = 0 A) B) Σ M = 0 B) C) Σ F = 0, and Σ M = 0 C) QUESTION QUESTION A Free Body Diagram (FBD) of a rigid body represents _____________ represents A) all applied external forces and moments B) all internal forces and moments B) C) all internal and external forces and moments C) QUESTION A...
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## This note was uploaded on 10/31/2010 for the course CEE CE 221 taught by Professor Baladi during the Fall '10 term at Michigan State University.

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