Systems of Part...

A small object of mass m is attached to a light string which passes through a hollow tube. The tube is hold by one hand and the string by the other. The object is set into rotation in a circle of radius R and velocity v. The string is then pulled down, shortening the radius of path of r. What is conserved?

A swimmer while jumping into water from a height easily forms a loop in the air, if

A ring of mass 10 kg and diameter 0.4 m is rotated about its axis. If it makes 2100 revolutions per minute, then its angular momentum will be

A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected

Angular momentum of the particle rotating with a central force is constant due to

Calculate the angular momentum of a body whose rotational energy is 10 joule. If the angular momentum vector coincides with the axis of rotation and its moment of inertia about this axis is 8 × 10^–7 kg/m²

If the earth is treated as a sphere of radius R and mass M. Its angular momentum about the axis of rotation with period T is

If the polar ice caps melt suddenly

A thin horizontal circular disc is rotating about a vertical axis passing through its centre. An insect is at rest at a point near the rim of the disc. The insect now moves along a diameter of the disc to reach other end. During the journey of the insect, then angular speed of the disc

A body moves with constant velocity v is a straight line parallel to x–axis. The angular momentum with respect to origin is