JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Analyzing +4 | -1

A cylinder of mass

m

and radius

R

rolls purely over an inclined surface while moving up on it. Correct statement regarding friction acting on it is

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Correct option: C

Friction is acting upward and static in nature

Option C (Friction is acting upward and static in nature) is correct because for pure rolling, the friction must be static and act upwards to provide the necessary torque for rotation.

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)