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A 70 kg man stands in contact against th...

A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3 m rotating about its vertical axis with 200 rev/min. The coefficient of friction between the wall and his clothing is 0.15 m What is the minimum rotational speed of the cylinder to enable the man to remain stuck to the wall (without falling) when the floor is suddenly removed ?

A

`sqrt(g//mur)`

B

`g//sqrt(mu r)`

C

`sqrt((mu r)/(g))`

D

`sqrt((gr)/(mu))`

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The correct Answer is:
A
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