# Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 85 - 90 of 125

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## Question number: 85

» Rotational Motion » Radius of Gyration

MCQ▾

### Question

The radius of gyration of a disc of mass 200 g and radius 3.2 cm, about an axis passing through its center of gravity and perpendicular to the plane is

### Choices

Choice (4) Response

a.

2.54 cm

b.

1.06 cm

c.

0.54 cm

d.

2.26 cm

## Question number: 86

» Rotational Motion » Rigid Body Rotation Equations of Rotational Motion

MCQ▾

### Question

A wheel has a speed of 1200 revolutions per minute and is made to slow down at a rate of 4 rad /s 2. The number of revolutions is makes before coming to rest is,

### Choices

Choice (4) Response

a.

272

b.

314

c.

143

d.

722

## Question number: 87

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

Moment of inertia of a disc about its own axis is I. its moment of inertia about a tangential axis in its plane is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 88

» Rotational Motion » Values of Moments of Inertia

MCQ▾

### Question

A constant torque of 3.6 N-m is exerted on a pivoted wheel. If angular acceleration of wheel is rad/sec 2, then the moment of inertia of the wheel is

### Choices

Choice (4) Response

a.

2.5 kg-m 2

b.

1.21 kg-m 2

c.

0.6 kg-m 2

d.

2.5 kg-m 3

## Question number: 89

» Rotational Motion » Angular Momentum

MCQ▾

### Question

An inclined plane makes an angle 45° with the horizontal. A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 90

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

Four thin rods of same mass M and same length l form a square as shown in figure. Moment of inertia of this system about an axis through center O and perpendicular to its plane is,

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page