A coin is placed on a rotating platform at distance 'r' from its axis of rotation . To avoid the skidding of coin from rotating platform , the maximum angular velocity `omega ` is

A coin is placed on a rotating platform at distance V from its axis of rotation.To avoid the skidding of coin from rotating platform, the maximum angular velocity omega is

A coin kept on a horizontal rotating disc has its centre at a distance of 0.25 m from the axis of rotation of the disc. If mu is 0.2, then the angular velocity of the disc at which the coin willslip off, is

A coin just remains on a disc rotating at 120 r.p.m. when kept at the distance of 1.5 cm from the axis of rotation. Find the coefficient of friction between the coin and the disc.

A coin is placed on a rotating tur table rolated with angular speed omega . The coin just slips if it is placed at 4 cm from the center of the table. If angular velocity is doubled, at what distance will coin starts to slip.

A coin is placed on a rotating turn table rotated with angular speed w. The coin just begins to slip if it is placed at 4 cm from the centre of the table. If the angular velocity is doubled, at what distance will the coin start to slip ?

A circular platform is free to rotate in a horizontal plane about a vertical axis passing through its centre. A tortoise is sitting at the edge of the platform Now, the platform is given an angular velocity omega_(0) . When the tortoise moves along a chord of the platform with a constant velocity (with respect to the platform), the angular velocity of the platform will vary with time t as -

A coin placed on a rotating gramophone disc, remains at rest when it is at a distance of 9 cm from its centre ,the angular velocity of the disc is then tripled .At what distance from the centre ,the coin should be placed , so that it will remain at rest ?