question_answer

A disc of radius R=10 cm oscillates as a physical pendulum about an axis perpendicular to the plane of the disc at a distance r from its centre. If \[r=\frac{R}{4}\], the approximate period of oscillation is \[\left( Take\,\,\,\,g=10\,\,\,\,m{{s}^{-2}} \right)\]

A) \[0.84s\]

B) \[0.94s\]       

C) \[1.26s\]            

D) \[1.42s\]