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NEET
Exam
NEET
Subject
Physics
Chapter
Rotational Motion

NEET · Physics · Rotational Motion

A solid sphere is rotating about an axis as shown in figure. An...

A solid sphere is rotating about an axis as shown in figure. An insect follows the dotted path on the circumference of sphere as shown. Then, match the following columns (
Column IColumn II
(A)Moment of inertia(p)Will remain constant
(B)Angular velocity(q)Will first increase,
then decrease
(C)Angular momentum(r)Will first decrease,
then increase
(D)Rotational kinetic energy(s)Will continuously decrease
)

Options

  1. Aa-q b-r c-p d-r
  2. Ba-p b-s c-r d-q
  3. Ca-q b-r c-s d-p
  4. Da-q b-p c-s d-r

Correct answer

A. a-q b-r c-p d-r

Step-by-step solution

(t=0∴L= constant ,K=L22I and Iω= constant ,\begin{aligned} & t=0 \\ & \therefore \quad L=\text{ constant }, K=\frac{L^2}{2 I} \text{ and } I \omega=\text{ constant }, \end{aligned}) Insect first moves away from the axis, the towards it. Hence, I will first increase and then decrease.
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