Home
Class 11
PHYSICS
A circular disc is rotating about its ow...

A circular disc is rotating about its own axis at the rate of `200` revolutions per minute. Two particles `P,Q` of disc are at distances `5cm,10cm` from axis of rotation. The ratio of angular velocities of `P` and `Q` is

A

`1:2`

B

`1:1`

C

`2:1`

D

`4:1`

Text Solution

Verified by Experts

The correct Answer is:
B
Angular velocity `omega`=Constant
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-II(C.W)|45 Videos

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-III(C.W)|48 Videos

  • MOTION IN A PLANE

    NARAYNA|Exercise C.U.Q|36 Videos

  • MECHANICAL PROPERTIES OF SOLIDS

    NARAYNA|Exercise LEVEL-II (H.W)|24 Videos

  • MOTION IN A STRAIGHT LINE

    NARAYNA|Exercise Level 2 H.W|29 Videos

Similar Questions

Explore conceptually related problems

A horizontal disc rotating about a vertical axis makes 100 revolutions per minute. A small piece of wax of mass 10 g falls vertically on the disc and adheres to it at a distance of 9 cm from the axis. If the number of revolutions per minute is thereby reduced to 90, calculate the moment of inertia of disc.

Obtain an expression for potential energy of a particle performing simple harmonic motion. Hence evaluate the potenhtial energy (a) at mean position and (b) extreme position. A horizontal disc is freely rotating about a transverse axit passing through its centre at the rate of 100 revolutions per minute. A 20 gram blob of wax falls on the disc and sticks to teh disc at a distance of 5 cm form its axis. Moment of inertia of the disc about its axit passing through its centre of mass is 2xx10^(-4) kg m^(2) . Calculate the new frequency of rotation of the disc.

Knowledge Check

  • A circular disc is rotating about its own axis, the direction of its angular momentum is

    A
    radial
    B
    along axis of rotation
    C
    along tangent
    D
    perpendicular to the direction of angular velocity

  • A circular plate is rotating about its own axis at an angular velocity 100 revolutions per minute. The linear velocity of a particle P of plate at a distance 4.2 cm from axis of rotation is

    A
    `0.22 m//s`
    B
    `0.44 m//s`
    C
    `2.2 m//s`
    D
    `4.4 m//s`

  • A circular disc is rotating about its own axis at uniform rate completes 30 rotations in one minute.The angular velocity of disc in rad s^(-1) is

    A
    `2pi`
    B
    `pi`
    C
    `pi/2`
    D
    `pi/4i`

    • Similar Questions

    Explore conceptually related problems

    A circular 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

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

    A circular disc is rotating about its own axis at constant angular acceleration. If its angular velocity increases from 210 rpm to 420 rpm during 21 rotations then the angular acceleration of disc is

    The blades of an aeroplane propeller are rotating at the rate of 600 revolutions per minute. Its angular velocity is:

    A circular disc of mass 4kg and of radius 10cm is rotating about its natural axis at the rate of 5 rad//sec . Its angular momentum is

    Home
    Profile