Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 48

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Consider a disc rolling without slipping on a horizontal surface at a linear speed $V$ as shown in the figure

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Important Questions on Rotational Mechanics

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 49

A cylinder rolls without slipping over a horizontal plane with constant velocity. The radius of the cylinder is equal to $r$ . At this moment

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 50

A uniform solid sphere is released from rest from the top of an inclined plane of inclination

θ .

Then choose the correct option(s).

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 51

A uniform solid cylinder rolls without slipping on a rough horizontal floor, its centre of mass moving with a speed

v

. It makes an elastic collision with a smooth vertical wall. After impact

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 52

If

\vec{τ} \times \vec{L} = 0

for a rigid body, where

\vec{τ} =

resultant torque and

\vec{L} =

angular momentum about a point and both are non-zero. Then

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 53

In absence of external forces on a rigid system, which of the following quantities must remain constant?

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 54

In the given figure a ball strikes a rod elastically and rod is smoothly hinged at point $A$ . Then which of the statement(s) is/are correct for the collision?

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 55

A horizontal disc rotates freely about a vertical fixed axis through its centre. A ring, having the same mass and radius as the disc, is now gently placed on the disc coaxially. After some time the two rotate with a common angular velocity.

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Alpha Question Bank for Engineering: Physics>Chapter 10 - Rotational Mechanics>Exercise - 2>Q 56

A wheel (to be considered as a ring) of mass $m$ and radius $R$ rolls without sliding on a horizontal surface with constant velocity $v$ . It encounters a step of height $\frac{R}{2}$ at which it ascends without sliding.