Moment of inertial .

A bar magnet of magnetic moment M and moment of inertial I is in the direction of magnetic meridian. If the magnet is displaced by a very small angle (theta) , the angular acceleration is (Magnetic induction of earth's horizontal field =B_(H) )

For a circular cardboard of uniform thickness and mass M, a square disc of the maximum possible are is cut. If the moment of inertia of the square with the moment of inertial of the square with the axis of rotation at the centre and perpendicular to the plane of the disc is (Ma^2)/6 , the radius of the circular cardboard is

A solid sphere of mass M and radius R having moment of inertial I about its diameter is recast into a solid disc of radius r and thickness t .The moment of inertia of the disc about an axis passing the edge and perpendicular to the plane remains "I" .Then r=(x)/(sqrt(15))R Find x=?

For a circular cardboard of uniform thickness and mass M, a square disc of the maximum possible are is cut. If the moment of inertia of the square with the moment of inertial of the square with the axis of rotation at the centre and perpendicular to the plane of the disc is (Ma^2)/6 , the radius of the circular cardboard is

A disc with moment of inertial I is rotating with some angular speed. Second disc is initially at rest. Now second disc with moment of inertia 3I is placed on first disc and starts rotating. Find loss of kinetic energy in fraction

A disc with moment of inertial I is rotating with some angular speed. Second disc is initially at rest. Now second disc with moment of inertia 3I is placed on first disc and starts rotating. Find loss of kinetic energy in fraction

A Moment of inertial of uniform disc and solid cylinder of equal mass and equal radius about an axis passing through centre and perpendicluar to plane will to same. Moment of inertia depends upon distribution of mass from the axis of rotation i.e., perpendicular distance from the axis.

A rigid body of moment of inertial I is projected with velocity V making an angle of 45^(@) with horizontal. The magnitude of angular momentum of the projectile about the point of projection when the body is its maximum height is given by (IV^(3))/(2sqrt(2)gR^(2)) where R is the radius of the rigid body. the ridid body is

The pulley shown in figure has a radius of 20 cm and moment of inertial 0.2 kg-m^2. The string going over it is attached at one end to a vertical sprign of spring constant 50 N/m fixed from below and supports a 1 kg mas at other end. The system is released from rest with the spring at its natural length. Find the speed of the block when it has desceds through 10 cm. Take g=10 m/s^2 .