Home
Class 11
PHYSICS
A circular ring of mass 20 g is rotating...

A circular ring of mass 20 g is rotating about its own axis with an angular velocity of 30 rpm. Two bodies of equal masses are placed simultaneously at the two extreme points along its diameter. Mass of each of these two bodies is 5 g. In this situation what will be the angular velocity of the system?

Text Solution

Verified by Experts

The correct Answer is:
20 rpm
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise Problem Set - I (Based on Rotational Kinetic Energy )|3 Videos

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise Problem Set - II (Based on Angular Velocity )|1 Videos

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise Short Answer Type Questions|4 Videos

  • QUESTION PAPERS OF WBCHSE -2018

    CHHAYA PUBLICATION|Exercise SECTION -II|20 Videos

  • SIMPLE HARMONIC MOTION

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|16 Videos

Similar Questions

Explore conceptually related problems

A thin circular ring of mass M and radius R is rotating about its own axis with a constant angular velocity omega . Two object each of mass m are placed gently on the opposite ends of a diameter of the ring. What will be the angular velocity of the ring?

A disc of mass 2 Kg and radius 1 m rotates about its own axis with and angular speed 60 rpm. Find its kinetic energy and angular momentum .

Knowledge Check

  • The motor of an engine is rotating about its axis with an angular velocity of 100 rpm. It comes to rest in 15 s, after being switched off. Assuming constant angular deceleration, what are the numbers of revolutions made by it before coming to rest ?

    A
    12.5
    B
    40
    C
    32.5
    D
    15.6

  • A thin circular ring of mass M and radius R is rotating about an axis perpendicular to the plane of the ring and passing through the centre with an angular velocity omega . Two bodies each of mass m are placed gently on the ring. The angular velocity with which the ring is rotating now is given by

    A
    `(omegaM)/(M+m)`
    B
    `(2(M-2m))/((M+2m))`
    C
    `(omegaM)/(M+2m)`
    D
    `(omega(M+2m))/(M)`

  • A rod of length l and mass is rotated in a horizontal plane about its one end with constant angular velocity omega . The tension at the middle section of the rod is

    A
    `omega^2l`
    B
    `(momega^2l)/2`
    C
    `3/4(momega^2l)`
    D
    `3/8(m omega^2l)`

    • Similar Questions

    Explore conceptually related problems

    A circular disc is rotating about its natural axis with angular velocity of 10 rad/s . A second disc of same mass is joined to it coaxially. If the radius of the second disc is half of the first one, then what is the angular velocity if they rotate together ?

    A thin uniform rod of mass M and length L is rotating about a perpendicular axis passing through its centre with a constant angular velocity omega . Two objects each of mass (M)/(3) are attached gently to the two end of the rod. The rod will now rotate with an angular velocity of

    In a merry-go-round a boy of mass 20 kg is revolving along a circular path of radius 10 m with an angular velocity of 6 rpm. What is the angular momentum of the boy?

    A force of 200 dyn acts on a mass of 10 g for 5 s. initially the body was at rest. What will be the final velocity of the mass?

    Two bodies weigh the same when measured in water. The mass of one is 30 g and its specific gravity is 6. If the mass of the other body is 45g, then what will be its specific gravity?

    Home
    Profile