Systems of Part...

Two disc one of the density 7.2 gm/cc and other of density 8.9 gm/cc are of the same mass and thickness their moment of inertia are in the ratio of ......

A Pulley of radius 2 m is rotated about its axis by a force F = (20t – 5t²)N where t is in sec applied tangentially. If the moment of inertia of the Pulley about its axis of rotation is 10KgM² the number of rotations made by the pulley before its direction of motion is reversed is

Four particles each of mass \'m\' are lying symmetrically on the rim of the disc of mass M and radius R moment of inertia of this system about an axis passing through one of the particles and perpendicular to plane of disc is _____

A mass M is supported by a mass less string wound around a uniform cylinder of mass M and radius R as in figure. With what acceleration will the mass fall on release?

A cord is wound round the circumference of wheel of radius r. the axis of the wheel is horizontal and moment of inertia about it is I A weight mg is attached to the end of the cord and falls from the rest. After falling through the distance h. the angular velocity of the wheel will be....

A meter stick of mass 400 gm is pivoted at one end and displaced through an angle 60^o the increase in its P.E. is ______ J.

Tow uniform rod of equal length but different masses are rigidly joined to form L shaped body which is then pivoted as shown. If in equilibrium the body is in the shown configuration ratio M/m will be.......

A light rod carries three equal masses A, B and C as shown in the figure the velocity of B in vertical position of rod if it is released from horizontal position as shown in the figure is .......

A gramophone record of mass M and radius R is rotating with angular speed W. If two pieces of wax each of mass M are kept on it at a distance of R/2 from the centre on opposite side then the new angular velocity will be.....