Home
Class 12
PHYSICS
A disc of mass 2 kg and radius 0.2 m is ...

A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity `30 "rad s"^(-1)`. What is angular velocity, if a mass of 0.25 kg is put on periphery of the disc ?

A

`"24 rad s"^(-1)`

B

`"36 rad s"^(-1)`

C

`"15 rad s"^(-1)`

D

`"26 rad s"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

A disc of mass 1 kg and radius 0.1 m is rotating with angular velocity "20 rad s"^(-1) . What is angular velocity, if a mass of 0.25 kg is put on periphery of the disc?

A disc of mass 1 kg and radius 0.1 m is rotating with angular velocity 20 rad/s. What is angular velocity (in rad/s) if a mass of 0.5 kg is put on the circumference of the disc ?

A uniform circular disc of mass 50kg and radius 0.4 m is rotating with an angular velocity of 10 rad s^(-1) about its own axis, which is vertical. Two uniform circular rings, each of mass 6.25 kg and radius 0.2 m, are gently placed symmetrically on the disc in such a manner that they are touching each other along the axis of the disc and are horizontal. Assume that the friction is large enough such that the rings are at rest relative to the disc and the system rotates about the original axis. The new angular velocity (in red s^(-1)) of the system is

A solid cylinder of mass 2 kg and radius 0.2m is rotating about its own axis without friction with angular velocity 3 rads/s. A particle of mass 0.5 kg and moving with a velocity 5 m/s strikes the cylinder and sticks to it as shown in figure. The angular momentum of the cylinder before collision will be?

A soild cylinder of mass 2 kg and radius 0.2 m is rotating about its owm axis without friction with an angular velocity of 3 rad s^(-1) . Angular momentum of the cylinder is

A ring of radius 0.5 m and mass 10 kg is rotating about its diameter with angular velocity of 20 rad s^(-1) . Its kinetic energy is

A wheel of mass 5 kg and radius 0.40 m is rolling on a road without sliding with angular velocity 10 rad s^-1 . The moment of ineria of the wheel about the axis of rotation is 0.65 kg m^2 . The percentage of kinetic energy of rotate in the total kinetic energy of the wheel is.

A disc of mass 4.8 kg and radius 1 m is rolling on a horizontal surface without sliding with angular velocity of 600 rotations/min. What is the total kinetic energy of the disc ?

An insect of mass m=3kg is inside a vertical drum of radius 2m that is rotating with an angular velocity of 5rads^(-1) . The insect doesn't fall off. Then, the minimum coefficient of friction required is

A disc is rotating with angular velocity omega . If a child sits on it, what is conserved?