Rotational Motion (NEET Physics): Questions 46 - 49 of 123

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Question number: 46

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Two spheres each of mass M and radius R2 are connected with a massless rod of length 2R as shown in the figure.

Two spheres connected with massless rod

Two Spheres Connected With Massless Rod

In figure two spheres each of mass M and radius R/2 connected with the massless rod of length 2R.

The moment of inertia of the system about an axis passing through the center of one of the spheres and perpendicular to the rod will be

Choices

Choice (4) Response

a.

25MR2

b.

52MR2

c.

521MR

d.

215MR2

Question number: 47

» Rotational Motion » Radius of Gyration

MCQ▾

Question

The moment of inertia of a sphere of mass M and radius R 2 about an axis passing through its center is -MR. The radius of gyration of the sphere about a parallel axis to the above and tangent to the sphere is,

Choices

Choice (4) Response

a.

75R

b.

35R

c.

(75)R

d.

(35)R

Question number: 48

» Rotational Motion » Values of Moments of Inertia

MCQ▾

Question

A cylinder of 800 g and radius 30 cm has moment of inertia (about its natural axis)

Choices

Choice (4) Response

a.

0.027kgm2

b.

0.030kgm2

c.

0.025kgm2

d.

0.036kgm2

Question number: 49

» Rotational Motion » Moment of Inertia

MCQ▾

Question

The density of a rod AB increases linearly from A to B. Its midpoint is O and its centre of mass is at C. Four axes pass through A, B, O and C all perpendicular to the length of the rod. The moments of inertia of the rod about this axis are I A, I B, I O and I C respectively then:

(1) IA>IB (2) IA<IB

(3) IO>IC (4) IO<IC

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

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