MHT CET 2025 19th April Morning Shift | Rotational Motion Question 15 | Physics

Four particles each of mass M are placed at the corners of a square of side $L$. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is

$\mathrm{L}$

$\frac{\mathrm{L}}{2}$

$\frac{\mathrm{L}}{4}$

$\frac{\mathrm{L}}{\sqrt{2}}$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

A thin uniform rod of mass ' $m$ ' and length ' $L$ ' is pivoted at one end so that it can rotate in a vertical plane. The free end is held vertically above pivot and then released. The angular acceleration of the rod when it makes an angle ' $\theta$ ' with the vertical is [consider negligible friction at the pivot] ( $\mathrm{g}=$ acceleration due to gravity)

MHT CET 2025 19th April Morning Shift Physics - Rotational Motion Question 13 English

$\frac{3 g \sin \theta}{2 L}$

$\frac{3 g \cos \theta}{2 L}$

$\frac{2 g \sin \theta}{3 L}$

$\frac{2 g \cos \theta}{3 L}$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

When a ceiling fan is switched off, its angular velocity falls to $\left(\frac{1}{3}\right)^{\text {rd }}$ while it makes 24 rotations. How many more rotations will it make before coming to rest?

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

Three point masses, each of mass ' $m$ ' are placed at the corners of an equilateral triangle of side ' $L$ '. The moment of inertia of the system about an axis passing through one of the vertices and parallel to the side joining other two vertices will be

$\frac{3 \mathrm{~mL}^2}{4}$

$\frac{\mathrm{mL}^2}{4}$

$\frac{3 \mathrm{~mL}^2}{2}$

$\frac{\mathrm{mL}^2}{2}$

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