Home
Class 11
PHYSICS
Two discs of moment of inertia I(1) and ...

Two discs of moment of inertia `I_(1)` and `I_(2)` are rotating separately with angular velocities `omega_(1)` and `omega_(2)` respectively about perpendicular axis passing through their centres. If these two rotating discs are connected coaxially then the rotational kinetic energy of the composite system will be

A

`(I_(1)omega_(1)+I_(2)omega_(2))/(2(I_(1)+I_(2)))`

B

`((I_(1)+I_(2))(omega_(1)+omega_(2)))/(2)`

C

`((I_(1)omega_(1)+I_(2)omega_(2))^(2))/(2(I_(1)+I_(2)))`

D

`((I_(1)+I_(2))(omega_(1)+omega_(2))^(2))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise Very Short Answer Type Questions|5 Videos

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise Very Short Answer Type Questions ( Based on Torque )|2 Videos

  • ROTATION OF RIGID BODIES

    CHHAYA PUBLICATION|Exercise EXERCISE ( Based on Rotational Kinetic Energy )|5 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

Moment of inertia of a disc is 100 g. cm^(2) . If the disc rotates with an angular velocity of 2 rad .s^(-1) the rotational kinetic energy of the disc is

Thicknesses of two iron discs of radii r and 4r are t and (t)/(4) respectively. If their moments of inertia are I_(1) and I_(2) respectively then

A circular disc rotates at 60 rpm about an axis passing through its centre. A coin of 18 g is placed at a distance of 8 cm from the centre of the disc. Calculate the centrifugal force on the coin.

If the moment of inertia of a body rotating about an axis is increased, state whether its angular velocity increases or decreases when no external torque acts on the body.

Two particles , each of mass m and charge q , are kept at the two ends of a light rod of length 2l and is rotated with a uniform angular velocity about the vertical axis passing through the centre of the rod . Determine the ratio of the magnetic moment and the angular momentum of the combination with respect to the centre of the rod .

A uniform rod of length L pivoted at one end P is freely rotated in a horizontal plane with an angular velocity omega about a vertical axis passing through P. If the temperature of the system is increased by Delta T , angular velocity becomes omega/2 . If coefficient of linear expansion of the rod is alpha (altlt1) , then DeltaT will be