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A block of mass m is placed on a rotating platform at a distance r from the axis of rotation. What should be the maximum angular velocity to avoid skidding of block [ take $\mu$ =the coefficient between the block and rotating plateform]

Option: 1
$\sqrt{\mu rg}$

Option: 2
$\sqrt{\frac{\mu r}{g}}$

Option: 3
$\sqrt{\frac{\mu g}{r}}$

Option: 4
$\mu \sqrt{\frac{ r}{g}}$

Answers (1)

best_answer

To avoid skidding

centripetal force = force of friction

$mw_{max}^{2}r = \mu mg$

$w_{max} = \sqrt{\frac{\mu g}{r}}$

Posted by

Divya Prakash Singh

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