Chapter 11 – Rotational Motion

A circular disk of moment of inertia It is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed ωi. Another disk of moment of inertia Ib is dropped coaxially on to the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant [...]

Two discs of moment of inertia I1 and I2 and angular speeds ω1 and ω2 are rotating along the collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combindly along the same axis the rotational K.E. of system will be A solid sphere is [...]

A round disc of moment of inertia I2 about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I1 rotating with an angular velocity ω about the same axis. The final angular velocity of the combination of discs is. A solid sphere is rotating [...]

A uniform horizontal circular platform of mass 200kg is rotating at 10 rpm about a vertical axis passing through its center. A boy of mass 50kg is standing at its edge. If the boy moves to the center of the platform, the frequency of rotation would become A solid sphere is rotating about a diameter [...]

If radius of the earth becomes to half of its present value with its mass remaining the same, the duration of one day will become If radius of the earth becomes to half of its present value with its mass remaining the same the duration of one day will become October 23, 2020 Category: Cengage [...]

A man standing on a platform holds weight in his outstretched arms. The system rotates freely about a central vertical axis. If he now draws the weights inward close to his body A man standing on a platform holds weight in his outstretched arms. The system rotates freely about a central vertical axis. If he [...]

A solid sphere is rotating about a diameter at an angular velocity ω. If it cools so that its radius reduces to I/n of its original value, its angular velocity becomes A solid sphere is rotating about a diameter at an angular velocity ω. If it cools so that its radius reduces to I/n of [...]

A particle of mass m is rotating in a plane in circular path of radius r. Its angular momentum is L. The centripetal force acting on the particle is A particle of mass m is rotating in a plane in circular path of radius r. Its angular momentum is L. The centripetal force acting on [...]

If the angular momentum of any rotating body increases by 200%, then the increase in its kinetic energy If the angular momentum of any rotating body increases by 200% then the increase in its kinetic energy October 23, 2020 Category: Cengage NEET by C.P Singh , Chapter 11 - Rotational Motion , Part 1 ,

Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momentum will be in the ratio. their angular momentum will be in the ratio. Two bodies have their moments of inertia I and 2I respectively about their axis of [...]