illustrate with the help of suitable diagram (a) point of application of force (b) line of action of force
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a. The point of application is the exact location at which a force is applied to a body. This point is usually described by a set of coordinates and is represented graphically by the tip of the arrowhead. The point of application is unique to each force. The point and the force cannot move.
b. In physics, the line of action of a force F is a geometric representation of how the force is applied. It is the line through the point at which the force is applied in the same direction as the vector F→. The concept is essential, for instance, for understanding the net effect of multiple forces applied to a body.
1st pic is for option a.
2nd pic is for option b.
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