Systems of Part...

A small disc of radius 2 cm is cut from a disc of radius 6 cm. If the distance between their centres is 3.2 cm, what is the shift in the centre of mass of the disc...

A smooth sphere A is moving on a frictionless horizontal plane with angular speed ω and centre of mass velocity v. It collides elastically and head on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ω_A and ω_B respectively, Then

Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. The rod is set rotating about an axis perpendicular to its length with a uniform angular speed. The point on the rod through which the axis should pass in order that the work required for rotation of the rod is minimum, is located at a distance of .....

A child is standing with folded hands at the centre of a platform rotating about its central axis the kinetic energy of the system is K. The child now stretches his arms so that the moment of inertia of the system doubles. The kinetic energy of the system now is...

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.....

The centre of mass of the disc undergoes S.H.M. with angular frequency ω equal to..

Three rings, each of mass P and radius θ are arranged as shown in the figure the moment of inertia of the arrangement about YY\' axis will be.

A solid sphere and a solid cylinder having same mass and radius roll down the same incline the ratio of their acceleration will be....

The ratio of angular momentum of the electron in the first allowed orbit to that in the second allowed orbit of hydrogen atom is ......

A player caught a cricket ball of mass 150 gm moving at a rate of 20 m/s If the catching process is Comlitad in 0.1 sec the force of the flow exerted by the ball on the hand of the player ..... N