Rotational Motion (NEET Physics): Questions 50 - 54 of 123

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Question number: 50

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Three point masses m 1, m 2, m 3 are located at the vertices of an equilateral triangle of length ‘a’. The moment of inertia of the system about an axis along the altitude of the triangle passing through m 1, is

Choices

Choice (4) Response

a.

(m1+m2+m3)a2

b.

(m2+m3)a24

c.

(m1+m2)a24

d.

(m2+m3)a2

Question number: 51

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Two discs of same thickness but of different radii are made of two different materials such that their masses are same. The densities of the materials are in the ratio 1: 3. The ratio of the moments of inertia of these discs about the respective axes passing through their centers and perpendicular to their planes will be in,

Choices

Choice (4) Response

a.

9: 1

b.

3: 1

c.

1: 9

d.

1: 3

Question number: 52

» Rotational Motion » Values of Moments of Inertia

MCQ▾

Question

A long rod has a mass of 0.12 kg and length of 1 m. The moment of inertia about an axis passing through the center and perpendicular to the length of rod will be

Choices

Choice (4) Response

a.

0.01 kg-m 2

b.

1 kg-m 2

c.

10 kg-m 2

d.

0.001 kg-m 2

Question number: 53

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Two discs of the same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio of,

Choices

Choice (4) Response

a.

1: 3

b.

1: 9

c.

1: 81

d.

1: 27

Question number: 54

» Rotational Motion » Moment of Inertia

MCQ▾

Question

A circular disc of radius R and thickness R6 has moment of inertia I about an axis passing through its center and perpendicular to its plane. It is melted and recanted into a solid sphere. The moment of inertia of the sphere about one of its diameters as an axis of rotation will be

Choices

Choice (4) Response

a.

2I8

b.

I10

c.

I5

d.

I

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