A rough platform OA rotates in a vertical plane about a horizontal axis through the point O with a constant counterclockwise velocity 
= 3 rad s -1 . As it passes through the position 
= 0, a small mass m is placed upon it at a radial distance. If the mass is observed to slip at 
= 37°, then the coefficient of friction between the mass & the member is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
As the mass is at the verge of slipping
mg sin 37 - 
mg cos 37 = m 
2 r
6 - 8 
= 4.5
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