Moment of inertia of a disc of radius R about a diametric axis is 35 "kg m"^(-2). The MI of the disc about a parallel axis at a distance R//2 from the centre is

Moment of inertia of a disc of radius R about a diametric axis is 35 "

1.	Moment of inertia of a disc of radius R about a diametric axis is 35 "kg m"^(-2). The MI of the disc about a parallel axis at a distance R//2 from the centre is
Answer» `31.25 "kg-m"^(2)` `37.5 "kg-m"^(2)` `50 "kg-m"^(2)` `62.5 "kg-m"^(2)` Solution :MOMENT of inertia of a disc about a parallel axis `I=I_(V)+md^(2)=(ma^(2))/(2)+md^(2)""(because a=R,d=R)` `rArr` Moment of inertia `= (3)/(2) ma^(2)=(3)/(2)(25)` `:.` Moment of inertia `=(75)/(2)=37.5 "kg m"^(-2)`.