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1.17. SINGLE EQUIVALENT FORCE

When a number of forces are acting on a rigid body, then these forces can be replaced by a single force which has the same effect on the rigid body as that of all the forces acting together, then this single, force is known as ‘Single Equivalent Force’. This single equivalent force is also known as resultant of several forces. Hence a single force which can replace a number of forces acting on a rigid body, without causing any change in the external effects on the body, is known as single equivalent force (or resultant force).