Sunday 17 November 2013

difference between Moment and Couple

What is the difference between Moment and Couple?
• Moment of force is the measure of turning effect of
a force about a point. A couple consists of two equal
and opposite forces acting with two different but
parallel lines of action. Each force has its own
moment.
• Moment of a force is dependent on the distance
from the pivot and the magnitude of the force while
the moment of a couple is the net effect of the two
moments of the forces. Moment of a couple is
independent of the location of the point considered. It
is constant throughout the plane. The resultant
moment of a couple is called a torque.
• Torque, also called moment or moment of force, is
the tendency of a force to rotate an object about an
axis, fulcrum, or pivot. Just as a force is a push or a
pull, a torque can be thought of as a twist.
Couple - Two equal but opposite forces
Torque - Moment of a couple

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