A thin horizontal circular disc is rotating a | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The system consists of the disc and the insect. Since there is no external torque acting on the system, the angular momentum $L = I\omega$ remains

Vedclass · Accepted Answer

first increases and then decreases

Vedclass · Answer

(B) The system consists of the disc and the insect. Since there is no external torque acting on the system, the angular momentum $L = I\omega$ remains constant.As the insect moves from the rim towards the center, the distance of the insect from the axis of rotation decreases, which causes the moment of inertia $I$ of the system to decrease.Since $L = I\omega$ is constant, as $I$ decreases, the angular speed $\omega$ increases.When the insect moves from the center towards the other end of the diameter, the distance from the axis increases, causing the moment of inertia $I$ to increase.Consequently, as $I$ increases, the angular speed $\omega$ decreases.Therefore, the angular speed of the disc first increases and then decreases.

$A$ thin horizontal circular disc is rotating about a vertical axis passing through its centre. An insect is at rest at a point near the rim of the disc. The insect now moves along a diameter of the disc to reach its other end. During the journey of the insect, the angular speed of the disc:

Similar Questions

The angular momentum of a moving body remains constant if

Different minerals are being mined from within the earth and multi-storeyed complexes are being constructed. Due to this activity,theoretically:

$A$ solid sphere is rotating in free space. If the radius of the sphere is increased while keeping its mass constant,which of the following quantities will remain unaffected?

$A$ thin circular ring of mass $M$ and radius $r$ is rotating about its axis with an angular speed $\omega$. Two particles each of mass $m$ are now attached at diametrically opposite points. The angular speed of the ring will become

Vedclass Test Series

Exam Paper Generator

Online Exam Module