The radius of circle

A circular disc of moment of inertia It is rotating in a horizontal plane about its symmetry axis with a constant angular velocity ωi. Another disc of moment of inertia Ib is dropped co-axially onto the rotating disc. Initially, the second disc has zero angular speed. Eventually, both the discs rotate with a constant angular [...]

A mass, m, moves in a circle on a smooth horizontal plane with velocity, V0​, at a radius, R0​. The mass is attached to a string which passes through a smooth hole in the plane as shown. The tension in the string is increased gradually and finally m moves in a circle of radius 2/R0​​. [...]

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω1​ and ω2​. They are brought into contact face to face coinciding the axis of rotation. The expression for loss coinciding of energy during this process is: initial position and [...]

The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig. y – projection of the radius vector of rotating particle P is : initial position and sense of revolution are indicated in the fig. y - projection of the radius vector of rotating particle P is [...]