A metallic hemisphere is having dust on its surface. The sphere is rotated about a vertical axis
Channel: Doubtnut
Date: 2020-02-16

A metallic hemisphere is having dust on its surface. The sphere is rotated about a vertical axis passing through its centre at angular speed `omega = 10 \"rad\" s^( �1)`. Now the dust is visible only on top `20%` area of the curved hemispherical surface. Radius of the hemisphere is R = 0.1 m. Find the coefficient of friction between the dust particle and the hemisphere [`g = 10 ms^(�2)`].