MHT CET 2019 2nd May Evening Shift | Rotational Motion Question 65 | Physics

When a 12000 joule of work is done on a flywheel, its frequency of rotation increases from 10 Hz to 20 Hz . The moment of inertia of flywheel about its axis of rotation is $\left(\pi^2=10\right)$

$1 \mathrm{~kgm}^2$

$2 \mathrm{~kgm}^2$

$1.688 \mathrm{~kgm}^2$

$1.5 \mathrm{~kgm}^2$

MHT CET 2019 2nd May Evening Shift

MCQ (Single Correct Answer)

-0

A rigid body is rotating with angular velocity ' $\omega$ ' about an axis of rotation. Let $v$ ' be the linear velocity of particle which is at perpendicular distance ' $r$ ' from the axis of rotation. Then the relation $v=r \omega$ ' implies that

$\omega$ does not depend on $r$

$\omega \propto \frac{1}{r}$

$\omega \propto r$

$\omega=0$

MHT CET 2019 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

If radius of the solid sphere is doubled by keeping its mass constant, the ratio of their moment of inertia about any of its diameter is

$1: 8$

$2: 5$

$2: 3$

$1: 4$

MHT CET 2019 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

A uniform rod of length ' 6 L ' and mass ' 8 m ' is pivoted at its centre ' $C$ '. Two masses ' $m$ ' and ' $2 m^{\prime}$ with speed $2 v, v$ as shown strikes the rod and stick to the rod. Initially the rod is at rest. Due to impact, if it rotates with angular velocity ' $\omega$ ' then ' $\omega$ ' will be

MHT CET 2019 2nd May Morning Shift Physics - Rotational Motion Question 8 English

$\frac{V}{5 L}$

zero

$\frac{8 v}{6 L}$

$\frac{11 v}{3 L}$

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