1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-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

A
2
B
2$$\sqrt2$$
C
4
D
1/2
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-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 1 English

A
$$v_0 / r$$
B
$$v_0 / 2 r$$
C
$$2 v_0 / r$$
D
$$v_0 r$$
3
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

Four holes of radius 5 cm are cut from a thin square plate of 20 cm and mass 1 kg. The moment of inertia of the remaining portion about Z-axis is

BITSAT 2022 Physics - Rotational Motion Question 4 English

A
15 kg-m2
B
0.37 kg-m2
C
0.0017 kg-m2
D
0.08 kg-m2
4
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

A solid sphere of 80 kg and radius 15 m moving in a space becomes a circular disc of radius 20 m in 1 h. The rate of change of moment of Inertia in this process is .......

A
$$\frac{30}{9}$$ kg-m2s$$-$$1
B
$$\frac{25}{9}$$ kg-m2s$$-$$1
C
$$\frac{10}{9}$$ kg-m2s$$-$$1
D
$$\frac{22}{9}$$ kg-m2s$$-$$1
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