Question:
A mosquito is sitting on an L.P. record disc rotating on a turn table at 333 per minute. The distance 3 of the mosquito from the centre of the turn table is $10 \mathrm{~cm}$. Show that the friction coefficient between the record and the mosquito is greater than It $\pi^{2} / 81$. Take $g=10 \mathrm{~m} / \mathrm{s}^{2}$.
Solution:
