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A ball of mass M is in equilibrium betwe...

A ball of mass M is in equilibrium between a vertical wall and the inclined surface of a wedge. The inclination of the wedge is `theta = 45^(@)` and its mass is very small compared to that of the ball. The coefficient of friction between the wedge and the floor is `mu` and there is no friction elsewhere. Find minimum value of `mu` for which this equilibrium is possible

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The correct Answer is:
`mu_("min") = 1`
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