A gramphone record is revolving with an angular velocity `omega`. A coin is placed at a distance `R` from the centre of the record. The static coefficient of friction is `mu`. The coin will revolve with the record if

Options

A. `rge(mug)/(omega^(2))`
B. `r-mugomega^(2)`
C. `rlt(omega^(2))/(mug)`
D. `rle(mug)/(omega^(2))`

Answer

D

Explanation

`mumgge(mv^(2))/(r)`
`rger^(2)`
`mumggemrw^(2)`
`rle(mug)/(w^(2))`