A coin is placed on a gramophone record rotating at a speed of 45 rpm, it flies away when the rotational speed is 50 rpm. If two such coins are placed one over the other on the same record both of them will fly away when rotational speed is

A coin placed on a gramophone record rotating 100/3 rpm flies off when it is placed at a distance greater than 16 cm from the axis of rotation, if the gramophone record is rotating at 200/3 then its distance from the axis of rotation is

A coin placed on a gramophone record at 100//3 rpm flies off when it is place at a distance grater than 16 cm from the axis of rotation. If the record is rotating at 200//3

A small coin is placed at a distance r from the centre of a gramophone record.The rotational speed of the record is gradually increased. If the coefficient of friction between the coin and the record is mu, the minimum angular frequency of the record for which the coin will fly off is given by :

A small coin is placed at a distance r from the centre of a gramophone record.The rotational speed of the record is gradually increased. If the coefficient of friction between the coin and the record is mu, the minimum angular frequency of the record for which the coin will fly off is given by :

A long playing record revolves with a speed of 33 (1/4) rev/min. and has a radius of 15 cm. Two coins are placed at 4 cm and 14 cm away from the centre of the record. If the coefficients of friction between the coin and the record is 0.15, which of the two coins will revolve with record ?

A small coin is placed on a record rotating at 33 1/3 rev/minute. The coin does not slip on the record. Where does it get the required centripetal force from?

Place a coin on gramophone disc near its centre and set the disc into the rotation. As the speed of rotation increases, the coin will slide away from the centre of the disc. The motion of coin is due to

Place a coin on gramophone disc near its centre and set the disc into the rotation. As the speed of rotation increases, the coin will slide away from the centre of the disc. The motion of coin is due to

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 ?

The shaft of a motor rotates at a constant speed of 1800 rpm. What is the angle in radians it has turned through in one second ?