Question

A uniform circular disc of radius `R` is rotating about its own axis with moment of inertia `I` at an angular velocity `omega` if a denser particle of mass `m` is gently attached to the rim of disc than its angular velocity is
A. `omega`
B. `Iomega(I+mR)`
C. `(I+mR^(2))/(Iomega)`
D. `(Iomega)/(I+mR^(2))`

Answer 1

Correct Answer - D
`I_(1)omega_(1)=I_(2)omega_(2), I_(1)=I, I_(2)=I+mR^(2)`