A disc starts rotating with constant angular acceleration of `pi ("rad")/s^(2)` about a fixed axis perpendicular to its plane and through its centre .
(a) Find the angular velocity of the disc after 4s .
(b) Find the angular displacement of the disc after 4 s and
(c ) Find number d of turns accomplished by the disc in 4 s .

A disc starts rotating with a constant angular acceleration of 1 rad//s^(2) about a fixed vertical axis perpendicular to its plane and passing through its centre. A coin of mass 10 gm is placed on the disc at a distance of 10cm from the axis. The coefficent of friction between the disc and the coin is 0.2 . The value of the frictional force on the coin at t=1s will be

A metal disc of radius R rotates with an angular velcoity omega about an axis perpendicular to its plane passing through its centre in a magnetic field B acting perpendicular to the plane of the disc. Calculate the induced emf between the rim and the axis of the disc.

A thin metallic disc is rotating with constant angular velocity about a vertical axis that is perpendicular to its plane and passes through its centre. The rotation causes the free electrons in the disc to redistribute. Assume that there is no external electric or magnetic field. Then

A disc of radius 0.1 m starts from rest with an angular acceleration of 4.4 rad//s^(2) .Then linear velocity of the point on its after 5 s is

A disc, initially at rest, starts rotating about its own axis/ with a constant angular acceleration of 0*2 rad/s2. The time taken by the disc to rotate by 10 rad (in seconds) is

A wheel starting from rest ia rotating with a constant angular velocity of 3 rad s^-1 . What is its angular acceleration after 4 s?

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 is (Js) is

A disc rotates about its axis with a constant angular acceleration of 4rad/s^2 . Find the radia and tangential acceleration of a particle at a distance of 1 cm from the axis at the end of the first second after the disc starts rotating.

A round disc of moment of inertia I_2 about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I_1 rotating with an angular velocity omega about the same axis. The final angular velocity of the combination of discs is.

A disc rotates about its axis with a constant angular accelertion of 2 rad//s^(2) . Find the radial and tangential accelerations of a particle at a distance of 10 cm from the axis at the end of the fourth second after the disc starts rotating.