JEE Advanced 2020 Full Test 2 Paper 2

An old record player of 10cm radius turns at 10rad∕s while mounted on a 30∘ incline as shown in the figure. A particle of mass m can be placed anywhere on the rotating record. If the least possible coefficient of friction µ that must exist for no slipping to occur is µ, find 2√3µ. [Take g=10m∕s2]