CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>QUESTIONS FOR SHORT ANSWER>Q 21

HARD

JEE Main

IMPORTANT

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A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will take the smallest time to cover a given length?

Important Questions on Rotational Mechanics

HARD

JEE Main

IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>QUESTIONS FOR SHORT ANSWER>Q 22

A sphere rolls on a horizontal surface. Is there any point of the sphere which has a vertical velocity?

HARD

JEE Main

IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>OBJECTIVE I>Q 1

Let

\hat{A}

be a unit vector along the axis of rotation of a purely rotating body and

\hat{B}

be a unit vector along the velocity of a particle

P

of the body away from the axis. What is the value of

\hat{A} . \hat{B}

?

EASY

JEE Main

IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>OBJECTIVE I>Q 2

A body is uniformly rotating about an axis fixed in an inertial frame of reference. Let

\hat{A}

be a unit vector along the axis of rotation and

\hat{B}

be the unit vector along the resultant force on a particle

P

of the body away from the axis. What is the value of

\hat{A} . \hat{B}

?

EASY

JEE Main

IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>OBJECTIVE I>Q 3

A particle moves with a constant velocity parallel to the

x

-axis. Its angular momentum with respect to the origin

MEDIUM

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IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>OBJECTIVE I>Q 4

A body is in pure rotation. The linear speed

v

of a particle, the distance

r

of the particle from the axis and the angular velocity

ω

of the body are related as

ω = \frac{v}{r} \cdot

Thus, identify the correct statement from the following.

MEDIUM

JEE Main

IMPORTANT

CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 10 - Rotational Mechanics>OBJECTIVE I>Q 5

Figure shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting $A$ and $B$ do not slip on the wheels. If $x$ and $y$ be the distances travelled by $A$ and $B$ in the same time interval, then:

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