A disc of radius R and mass M is pivoted at the rim and set for small oscillations about an axis perpendicular to plane of disc. If simple pendulum have same time period as of disc, the length of pendulum should be
Time period of physical pendulum -
- wherein
moment of inertia about point of hinge
Seperation between point of suspension & centre of mass
Option 1)
This is incorrect.
Option 2)
This is incorrect.
Option 3)
This is incorrect.
Option 4)
This is correct.
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