MHT CET 2026 11th April Morning Shift | Rotational Motion Question 33 | Physics

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

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

The moment of inertia of a thin uniform rod of mass ' $M$ ' and length ' $L$ ', about an axis perpendicular to length of the rod and at a distance ' $L / 4$ ' from one end is

$\frac{\mathrm{ML}^2}{6}$

$\frac{\mathrm{ML}^2}{12}$

$\frac{7 \mathrm{ML}^2}{24}$

$\frac{7 \mathrm{ML}^2}{48}$

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