JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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The moment of inertia of a ___A___ body about an axis ___B___ to its plane is equal to the sum of its moments of inertia about two ___C___ axes concurrent with perpendicular axis and lying in the plane of the body. Here, A, B, and C refer to:

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Correct option: C

Planar, perpendicular, and perpendicular

Option C (Planar, perpendicular, and perpendicular) is correct because it accurately describes the perpendicular axis theorem for planar bodies.

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It is easier for a swimmer jumping into water from a height to describe a loop in the air by A uniform thin rod

\mathrm{AB}

of length

\mathrm{L}

has linear mass density

\mu(x)=a+\frac{b x}{L}

, where

x

is measured from

\mathrm{A}

. If the

\mathrm{CM}

of the rod lies at a distance of

\left(\frac{7}{12}\right) \mathrm{L}

from

\mathrm{A}

, then a and

\mathrm{b}

1.0 \mathrm{~g}

is rotating in a circle of diameter

8 \mathrm{~cm}

. Its moment of inertia will be The angular velocity of a particle is given by

\omega = {t^4} + 2{t^3}

then its angular acceleration of the particle at

t = 1\,sec

\left( {rad\,{s^{ - 2}}} \right)