HOT Que.Series 18Aug Physics Rotational Motion

Moment of inertia of a disc about an axis which is tangent and parallel to its plane is I. then the moment of inertia of disc about a tangent, but perpendicular to its plane will be

Calculate the M.I. of a thin uniform ring about an axis tangent to the ring and in a plane of the ring, if its M.I. about an axis passing through the centre and perpendicular to plane is 4 kg m²

By keeping moment of inertia of a body constant, if we double the time period, then angular momentum of body

The M.I. of a disc about an axis passing through its centre and perpendicular to plane is MR^2/2, then its M.I. about a tangent parallel to its diameter is

Four solid spheres each of mass M and diameter 2r, are placed with their centers on the four corners of a square of side a (> 2r). the moment of inertia of the system about one side of square is

For increasing the angular velocity of a object by 10%, the kinetic energy has to be increased by

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to the plane with angular velocity ω. Another disc of same mass but half the radius is gently placed over it coaxially. The angular speed of the composite disc will be

Which is the wrong relation from the following?

Two circular discs A and B have equal masses and uniform thickness but have densities ρ₁ and ρ₂ such that ρ₁ >ρ₂. their moment of inertia is