A circular disc is rotating about its natural axis with angular velocity of 10 rad/s . A second disc of same mass is joined to it coaxially. If the radius of the second disc is half of the first one, then what is the angular velocity if they rotate together ?

A thin circular ring of mass M and radius R is rotating about its own axis with a constant angular velocity omega . Two object each of mass m are placed gently on the opposite ends of a diameter of the ring. What will be the angular velocity of the ring?

A circular ring of mass 20 g is rotating about its own axis with an angular velocity of 30 rpm. Two bodies of equal masses are placed simultaneously at the two extreme points along its diameter. Mass of each of these two bodies is 5 g. In this situation what will be the angular velocity of the system?

A wheel is rotating 300 times per minute. The angular velocity of the wheel in rad cdot s^(-1) unit is

A semicircular wire of radius r is rotating with angular velocity omega in a uniform magnetic field B with its radius as axis. If the resistance of the circuit be R and if the axis of rotation remains perpendicular to B, what will be the average power produced in each period?

A metallic disc of radius 10 cm is rotating uniformly about a horizontal axis passing through its centre with angular velocity 10 revolution per second. A uniform magnetic field of intensity 10^(-2)T acts along the axis of the disc. Find the potential difference induced between the centre and the rim of the disc.

A thin uniform rod of mass M and length L is rotating about a perpendicular axis passing through its centre with a constant angular velocity omega . Two objects each of mass (M)/(3) are attached gently to the two end of the rod. The rod will now rotate with an angular velocity of

The motor of an engine is rotating about its axis with an angular velocity of 100 rpm. It comes to rest in 15 s, after being switched off. Assuming constant angular deceleration, what are the numbers of revolutions made by it before coming to rest ?