Question

In the above three figures, the arrows indicate the direction of force and magnitude of force is mentioned near the arrows. Which box is experiencing balanced force?

A

Box i

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B

Box ii

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C

Box iii

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D

Both Box i and ii

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Solution

The correct option is C Box iii Equal forces acting in opposite direction will cancel each other and the block will not move. Such forces are called balanced forces. If the block is either pulled or pushed from both the sides with equal forces, the block will not move. Such forces are called balanced forces and do not change the state of rest or of motion of an object. Case i – The pull forces are acting in opposite direction but the magnitude of forces are not same. Thus, the forces are unbalanced forces. Case ii - Though the magnitudes are same, the block is experiencing both the force in the same direction, thus they do not cancel each other. The forces are unbalanced. Case iii- Though the arrows are shown on the same side, the direction of arrows are opposite, and the magnitudes of forces are equal. Thus, the forces cancel out each other and become balanced. So, correct option is C.

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