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Balanced and Unbalanced Forces

Two strings X and Y are attached to a wooden block on opposite sides and placed on a table. When the string X is pulled, the block starts moving in the direction of the force acting on X. When the string Y is pulled, the block moves in the direction of the force acting on Y. But if both X and Y are pulled simultaneously with the same force, the block does not move, because they are attached in opposite directions. It means that the two forces acting on the block are balanced. Thus we can understand that the state of rest or motion of an object does not change when balanced forces act on it.

Consider the case when the two forces acting on X and Y are opposing forces which are not equal. The forces are said to be unbalanced forces. Here, the block will move in the direction of the greater force. If an unbalanced force is applied on the object, there will be a change either in its speed or in the direction of motion and as long as this unbalanced force acts, this change will continue. Therefore to accelerate the motion of an object, an unbalanced force is required.

When this force is removed, the object will continue to move with the velocity it has acquired till then.



Balanced Forces

Unbalanced Forces


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