Two cylindrical hollow drums of radii and 2R, and of a common height h, are rotating with angular velocities `omega` (anticlockwise) and `omega` (clockwise), respectively, Their axes, fixed are parallel and in a horizontal plane separated by `(3R + delta)`. They are now brought in contact `(deltararr 0)`. Show the frictional forces just after contact.

Two cylindrical hollow drums of radii and 2R, and of a common height h, are rotating with angular velocities omega (anticlockwise) and omega (clockwise), respectively, Their axes, fixed are parallel and in a horizontal plane separated by (3R + delta) . They are now brought in contact (deltararr 0) . Identify forces and torques external to the system just after contact.

Two cylindrical hollow drums of radii and 2R, and of a common height h, are rotating with angular velocities omega (anticlockwise) and omega (clockwise), respectively, Their axes, fixed are parallel and in a horizontal plane separated by (3R + delta) . They are now brought in contact (deltararr 0) . What would be the ratio of final angular velocities when fiction ceases?

A disc of radius R is rotating with an angular speed omega_0 about a horizontal axis. it is placed on a horizontal table. The coefficient of kinetic friction is mu_k . What was the velocity of its centre of mass before being brought in contact with the table?

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Find the angular speed of the two-disc system.

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Does the law of conservation of angular momentum apply to the situation? Why?

A disc spinning clockwise about its axis with angular velocity omega_0 is set on a rough horizontal plane[Fig.]. What is the force of friction after rolling without slipping starts? .

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Calculate the loss in kinetic energy of the system in the process.

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Account for this loss.

Two parallel vertical metallic rails AB and CD are separated by 1m. They are connected at the two ends by resistances R_1 and R_2 as shown in the figure. A horizontal metallic bar 1 of mass 0.2 kg slides without friction, vertically down the rails under the action of gravity. There is a uniform horizontal magnetic field of 0.6 T perpendicular to the plane of the rails. It is observed that when the terminal velocity is attained, the powers dissipated in R_1 and R_2 are 0.76W and 1.2W respectively (g=9.8m//s^2) The value of R_2 is

A disc of radius R is rotating with an angular speed omega_0 about a horizontal axis. it is placed on a horizontal table. The coefficient of kinetic friction is mu_k . Which force is responsible for the effects in what happens to the linear velocity of a point on its rim when placed in contact with the table? and What happens to the linear speed of the centre of mass when disc is placed in contact with the table?