JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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A large number of particles are placed around the origin, each at a distance

R

from the origin. The distance of the centre of mass of the system from the origin is

View answer and explanation

Correct option: B

less than or equal to

R

Option B (less than or equal to

R

) is correct because the center of mass will either be at the origin (if particles are uniformly distributed) or closer to the origin than the farthest particle.

More Questions from SYSTEM OF PARTICLES

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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)