A small block is placed on a horizontal rotating disc wrt vertical axis passing centre of disc, at constant angular velocity w. Find distance of blocxk from centre of disc if disc doesnt slip

A uniform rod of mass m and length L lies radialy on a disc rotating with angular speed omega in a horizontal plane about vertical axis passing thorugh centre of disc. The rod does not slip on the disc and the centre of the rod is at a distance 2L from the centre of the disc. them the kinetic energy of the rod is

Select ALL correct answer : A disc of radius R is placed over a horizontal table in such a way that plane of the disc is horizontal and rotated about its vertical axis passing through its center with angular velocity omega . A layer of grease of thickness l is present between the table and the disc.Coefficient of viscosity of grease is eta .Then, (A) torque needed to rotate the disc with constant angular velocity is (pi eta omega R^(4))/(4l) (B) torque needed to rotate the disc with constant angular velocity is (pi eta omega R^(4))/(2l) (C) power needed to rotate the disc with constant angular velocity is (pi eta omega^(2)R^(4))/(2l) (D) power needed to rotate the disc with constant angular velocity is (pi n omega^(2)R^(4))/(4l)

A coin placed on a horizontal rotating disc, with its centre at 10 cm from the centre of the disc, is about to slip off when the disc performs 60 rpm. Find the coefficient of friction between the coin and the disc.

A uniform disc of mass M and radius R is rotating about a horizontal axis passing through its centre with angular velocity omega . A piece of mass m breaks from the disc and flies off vertically upwards. The angular speed of the disc will be

A horizontal disc is rotating about a vertical axis passing through its centre. If an insect moves from centre to rim then the angular momentum of the system

A horizontal disc is rotating about a vertical axis passing through its centre. If an insect moves from centre to rim then the angular momentum of the system

A circular disc rotates about an axis passing through its centre with a certain angular velocity. Suddenly a small piece of the disc is broken from the edge and falls down. Then

A small coin of mass 80g is placed on the horizontal surface of a rotating disc. The disc starts from rest and is given a constant angular acceleration alpha=2rad//s^(2) . The coefficient of static friction between the coin and the disc is mu_(s)=3//4 and cofficient of kinetic friction is mu_(k)=0.5 . The coin is placed at a distance r=1m from the centre of the disc. The magnitude of the resultant force on the coin exerted by the disc just before it starts slipping on the disc is