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Unformatted text preview: simplifies the equilibrium analysis of some rigid bodies. EQUATIONS OF EQUILIBRIUM
If A body is subjected to a system of forces lie in the xy plane, then the body is in equilibrium if and only if F 1 the net forces and net moments acting on the body are zero. This 2D condition can be represented by the three scalar equations
y F3 F4 O x ∑F X = ∑ FY = ∑ M O = 0.0
F2 where “O” is any arbitrary point. SUPPORT REACTIONS IN 2D SUPPORT REACTIONS IN 2D SUPPORT REACTIONS IN 2D In general, if a support prevents translation of a body in a given direction, a force acts on the body in the opposite direction. Similarly, if rotation is prevented, a couple moment is exerted on the body. Support Reactions in 2D
No support reactions against horizontal translation
100 lb F R1Y R2Y As a general rule, if a support prevents translation of a body in a given direction, then a force is developed on the body in the opposite direction. Similarly, if rotation is prevented, a couple moment is exerted on the body. SUPPORT REACTIONS IN 2D
F .
R1Y R2Y RX As a general rule, if a support prevents translation of a body in a given direction, then a force is developed on the body in the opposite direction. Similarl...
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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.
 Fall '10
 Baladi
 Equilibrium

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