A point mass ' m ' is moved in a vertical circle of radius ' r ' with the help of a string. The velocity of the mass is at the lowest point. The tension in the string at the lowest point is

In uniform circular motion the following quantities remain constant-

The angular speed of the wheel of a vehicle is increased from 600rpm to 1500rpm in 30 second. Its angular acceleration is,

The acceleration of an electron due to the mutual attraction between the electron and a proton when they are 1.6 Å apart is,

A point mass ' m ' is moved in a vertical circle of radius ' r ' with the help of a string. The velocity of the mass is at the lowest point. The tension in the string at the lowest point is

A particle moving with uniform speed in a circular path maintains:

The angular acceleration of a body, moving along the circumference of a circle, is

A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:

Two particles A and B are moving in uniform circular motion in concentric circles of radii
Their time period of rotation is the same. The ratio of
angular speed of A to that of B will be:

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:

In uniform circular motion the following quantities remain constant-