N_-_Rigid_Body_Equilibrium_2-D

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

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

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.

Ask a homework question - tutors are online