Home
Class 12
PHYSICS
A uniform ring of mass M of outside rad...

A uniform ring of mass `M` of outside radius `r_(2)` is fitted tightly with a shaft of radius `r_(1)`. If the shaft is rotated with a constant angular acceleration. About it's axis, the moment of the elastic force in the ring about the axes of rotation is

A

`mbeta(r_2^2+r_1^2)`

B

`(mbeta(r_2^2+r_1^2))/(2)`

C

`mbeta(r_2^2-r_1^2)`

D

`(mbeta(r_2^2-r_1^2))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A body of mass 'm' and radius of gyration 'K' is rotating with angular acceleration a. Then the torque acting on the body is

A circular disc of radius 20 cm is rotating about its own axis at an angular velocity omega . The angular velocity of a particle 'A' which is at a distance 10 cm from the axis of rotation is

A body of mass 'm' and radius of gyration 'K' is rotating with angular acceleration alpha . Then, the torque acting on the body is:

A charge Q is spread uniformly over an insulated ring of radius R .What is the magnetic moment of the ring if it is rotated with an angluar velocity omega about its axis?

A solid sphere has a radius R . If the radius of gyration of this sphere about its diameter is sqrt(2//5) R , show that the radius of gyration about the tangential axis of rotation is sqrt(7//5) R

A body of mass M is rotating about an axis with angular velocity omega . If k is radius of gyration of the body about the given axis, its angular momentum is

A ring of mass 10 kg and diameter 0.4 m is rotated about an axis passing through its centre and perpendicular to its plane. Moment of inertia of the ring is

A circular disc of radius R and thickness R/6 has moment of inertia I about an axis passing through. Its is melted and recast into a solid sphere. What is the moment of inertia of the solid sphere about its diameter as the axis of rotation?

When a circular disc of radius 0.5 m is rotating about its own axis then the direction of its angular momentum is

A uniform disc of mass 2 kg is rotated about an axis perpendicular to the plane of the disc. If radius gyration is 50 cm, then the M.I. of the disc about same axis is