Solve this:
Q.5. Two rods each of mass m and length l are joined at the centre to form a cross. The moment of inertia of this cross about an axis passing through the common centre of the rods and perpendicular to the plane formed by them, is .
(1)
(2)
(3)
(4)
Dear student ,
moment of inertia about centre of one rod = ml2/12
moment of inertia about centre of other rod is also = ml2/12
as both moment of inertia are on the common axis
so net moment of inertia = ml2/12 + ml2/12 = ml2/6 answer
moment of inertia about centre of one rod = ml2/12
moment of inertia about centre of other rod is also = ml2/12
as both moment of inertia are on the common axis
so net moment of inertia = ml2/12 + ml2/12 = ml2/6 answer