JEE Advanced 2021 Full Test 2 Paper 2

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SECTION – C (Numerical Answer Type)
This section contains 06 questions. The answer to each question is a NUMERICAL VALUE. For each question, enter the correct numerical value (in decimal notation, truncated/rounded-off to the SECOND DECIMAL PLACE; e.g. XXXXX. XX).
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Question : 17 of 54
 
Marks: +1, -0
A metallic hemisphere is having dust on its surface. The sphere is rotated about a vertical axis passing through its centre at angular speed ω=10rads−1. Now the dust is visible only on top 20% area of the curved hemispherical surface. Radius of the hemisphere is R=0.1m. Find the coefficient of friction between the dust particle and the hemisphere [g=10ms−2].
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