List of top Physics Questions on System of Particles & Rotational Motion asked in EAMCET

Circular disc of mass 2 kg and radius 1 m is rotating about an axis perpendicular to its plane and passing through its centre of mass with a rotational kinetic energy of 8 J. The angular momentum in (J-s) is

$I_S$ and $I_H$ are the moments of inertia about the diameters of a solid and thin walled hollow sphere respectively. If the radii and the masses of the above spheres are equal, $I_H > I_S$. In solid sphere, the mass is continuously and regularly distributed about the centre whereas the mass, to a large extent, is concentrated on the surface of hollow sphere

Four particles, each of mass 1 kg are placed at the comers of a square OABC of side 1 m. O is at the origin of the co-ordinate system. OA and OC are aligned along positive X-axis and positive V-axis respectively. The position vector of the centre of mass is (in m):

A uniform cylindrical rod of mass M and length L is rotating with an angular speed $ \omega $ . The axis of rotation is perpendicular to its axis of symmetry and passes through one of its end faces. If the room temperature increases by t and the coefficient of linear expansion of the rod is $ \alpha $ , the magnitude of the change in its angular speed is:

Four particles, each of mass 1 kg, are placed at the corners of a square of side 1m in the X- Y plane. If the point of intersection of the diagonals of the square, is taken as the origin, the co-ordinates of the centre of mass are:

Two circular loops A and B or radii $r_A$ and $ r_B$ respectively are made from a uniform wire. The ratio of their moments of inertia about axes passing through their centers and perpendicular to their planes is $\frac{I_B}{I_A}=8,\,then\,\left(\frac{r_B}{r_A}\right) $ equal to