Monday, February 16, 2009
Principle of moments.
The principle of moments means for a body in equilibrium, the sum of the clockwise moments is equal to the sum of the anticlockwise moments about the same point.from: http://www.fearofphysics.com/w.php?define=principle%20of%20moments.
and from TutorVista.com,
If a body is in equilibrium under the action of a number of forces, then the algebraic sum of the moments of the forces about any point is equal to zero. In other words, the sum of the clockwise moments equals sum of the anticlockwise moments when the body is in equilibrium.
Clockwise moments equal to anti-clockwise moments.
In the figure above,
sum of clockwise moments = sum of anti-clockwise moments
(50 x 40) + (100 x 20) + (60 x 10) = (30 x 20) + (100 x 40)
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