Home
Class 12
PHYSICS
A thinuniform circular disc of mass M an...

A thinuniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane withan angular velocity `omega`.Another disc of same dimensions but of mass M/4 is placed gently onthe first disc co-axially, then the angular velocity of the system is

A

`sqrt2 omega`

B

`4 omega//5`

C

`3 omega//4`

D

`4 omega`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

Auniform disc of mass M and radius R is rotating in a horizontal plane about anaxis perpendicular to its plane with an angular velocity omega . Another disc of mass M/3 and radius R/2 is placed gently on the first disc coaxially. Then final angular velocity of the system is

State an expression for moment inertia of a thin uniform disc about an axis passing through its centre and perpendicular to its plane .

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 disc of moment of inertia I_1 , is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed omega_1 . Another disc of moment of inertia I_2 having angular speed omega_2 The energy lost by the initial rotating disc is

A disc of mass 2 kg and radius 0.2 m is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity 50 rad/s. Another disc of mass 4 kg and radius 0.1m rotates about an axis passing through its centre and perpendicular to its plane with angular velocity 100 rad/s. If the two discs are coaxially coupled, then the angular velocity of the coupled system would be

A thin wire of mass m and length l is bent in the form of a ring . Moment of inertia of that ring about an axis passing througfh its centre and perpendicular to its plane is

A circular disc of mass 10 kg and radious 0.2 m is set into rotation about an axis passing through its centre and perpendicular to its plane by applying torque 10 Nm. Calculate angular velocity of the disc that it will attain at the end of 6 s from the rest.

A solid cylinder, has mass 'M', radius 'R' and length 'l'. Its moment of inertia about an axis passing through its centre and perpendicular to its own axis is

The radius of gyration of a disc of mass 100 g and radius 5 cm about an axis passing through its centre of gravity and perpendicular to the plane is

M.I.of a uniform disc about an axis passing through its centre and perpendicular to its plane is 10 kg m^2 .Find its M.I. about the diameter.