Question

Two spheres of same mass and radius are in contact with each other. If the moment of inertia of a sphere about its diameter is I, then the moment of inertia of both the spheres about the tangent at their common point would be
A. 3I
B. 7I
C. 4I
D. 5I

Answer 1

Correct Answer - B
`I=2/5 mR^(2)`

`I_(1)=2(2/5 mR^(2)+mR^(2))=14/5 mR^(2)=7I`