BITSAT 2024 | Rotational Motion Question 2 | Physics

A rigid body rotates about a fixed axis with variable angular velocity equal to $ \alpha-\beta t $, at the time $ t $, where $ \alpha, \beta $ are constants. The angle through which it rotates before it stops is

$ \frac{\alpha^{2}}{2 \beta} $

$ \frac{\alpha^{2}-\beta^{2}}{2 \alpha} $

$ \frac{\alpha^{2}-\beta^{2}}{2 \beta} $

$ \frac{(\alpha-\beta) \alpha}{2} $

BITSAT 2023

MCQ (Single Correct Answer)

-1

Two rings of radius $$R$$ and $$n R$$ made of same material have the ratio of moment of inertia about an axis passing through centre is $$1: 64$$. The value of $$n$$ is

2$$\sqrt2$$

1/2

BITSAT 2023

MCQ (Single Correct Answer)

-1

A thin but rigid semicircular wire frame of radius $$r$$ is hinged at $$O$$ and can rotate in its own vertical plane. A smooth peg $$P$$ starts from $$O$$ and moves horizontally with constant speed $$2 v_0$$ lifting the frame upward as shown in figure. Find the angular velocity $$\omega$$ of the frame when its diameter makes an angle of $$60^{\circ}$$ with vertical.

BITSAT 2023 Physics - Rotational Motion Question 4 English

$$v_0 / r$$

$$v_0 / 2 r$$

$$2 v_0 / r$$

$$v_0 r$$

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