MHT CET 2026 11th April Evening Shift | Rotational Motion Question 32 | Physics

Let M and L be the mass and length of thin uniform rod respectively. In first case, axis of rotation is passing through centre and perpendicular to length of rod. In second case axis of rotation is passing through one end and perpendicular to length of rod. The ratio of radius of gyration in first case to second case is

$\dfrac{1}{4}$

$\dfrac{1}{2}$

$\dfrac{1}{8}$

$\dfrac{1}{6}$

MHT CET 2026 11th April Morning Shift

MCQ (Single Correct Answer)

-0

A wheel is rotating at $600$ rpm about its axis of rotation. When the power is cut off, it comes to rest in half a minute. Its angular retardation expressed in $\text{rad}/\text{s}^2$ is (retardation is uniform)

$\dfrac{2\pi}{3}$

$\dfrac{\pi}{4}$

$\pi$

$\dfrac{\pi}{6}$

MHT CET 2026 11th April Morning Shift

MCQ (Single Correct Answer)

-0

A flywheel rotating about a fixed axis has a kinetic energy of $500$ joule, if its angular frequency is $5$ Hz, then calculate the moment of inertia of the wheel about the axis of rotation. ($\pi^2=10$)

$0.6 \text{ kg m}^2$

$1 \text{ kg m}^2$

$0.75 \text{ kg m}^2$

$0.15 \text{ kg m}^2$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

The angular momentum of a rotating body is ' $L$ '. When the frequency of rotating body is tripled and its kinetic energy is made one-third, the new angular momentum becomes

$\frac{1}{9} \mathrm{~L}$

$\frac{1}{3} \mathrm{~L}$

6 L

9 L

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