# Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 118 - 121 of 125

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## Question number: 118

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

Moment of inertia of a disc about its own axis is 6I its moment of inertia about a tangential axis in its plane is

### Choices

Choice (4) Response

a.

b.

12 I

c.

d.

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## Question number: 119

» Rotational Motion » Concepts of Rotational Motion

Assertion-Reason▾

### Assertion (Ꭺ)

Two cylinders, one hollow (metal) and the other solid (wood) with the same mass and identical dimensions are simultaneously allowed to roll without slipping down an inclined plane from the same height. The hollow cylinder will reach the bottom of the inclined plane first.

### Reason (Ꭱ)

By the principle of conservation of energy. The total kinetic energies of both the cylinders are identical when they reach the bottom of the incline.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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## Question number: 120

» Rotational Motion » Frequency and Period

MCQ▾

### Question

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length l and height h. Find the time it takes to reach at bottom.

### Choices

Choice (4) Response

a.

b.

c.

d.

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## Question number: 121

» Rotational Motion » Angular Momentum

MCQ▾

### Question

An inclined plane makes an angle 30° 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.

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