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In Fig force F is gradually increased fr...

In Fig force `F` is gradually increased from zero Draw the graph between applied force `F` and tension `T` is the string . The coefficient of string friction between the block and the ground is `mu_(s)`

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As the external force F is gradually increased from zero it is compensated by the friction and the string beares no tension. When limiting friction is achieved by increasing force F to a value till`mu_(s)` mg, the further increase in F is transferred to the string.
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