# Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 108 - 112 of 125

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## Question number: 108

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

The moment of inertia of a uniform circular ring, having a mass M and a radius R, about an axis tangential to the ring and perpendicular to its plane, is

### Choices

Choice (4) Response

a.

b.

c.

d.

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## Question number: 109

» Rotational Motion » Torque

Assertion-Reason▾

### Assertion (Ꭺ)

The force of fiction in the case of a disc rolling without slipping down an inclined plane is .

### Reason (Ꭱ)

When the disc rolls without slipping, friction is required because for rolling condition velocity of point of contact is zero.

### Choices

Choice (4) Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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## Question number: 110

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

The moment of inertia of a thin rod of mass M and length L about an axis perpendicular to the rod at a distance from one end is

### Choices

Choice (4) Response

a.

b.

c.

d.

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## Question number: 111

» Rotational Motion » Torque

MCQ▾

### Question

A boy is pushes a merry-go-round of radius 3 m with a force 50 N as shown in below figure. If cos 20 0 = 0.9, then the torque applied by the boy is,

### Choices

Choice (4) Response

a.

40 Nm

b.

141 Nm

c.

135 Nm

d.

0 Nm

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## Question number: 112

» Rotational Motion » Torque

MCQ▾

### Question

A particle of mass m is moving in a plane along a circle of radius r. Its angular momentum about the axis of rotation is L. What is the centripetal force acting on the particle?

### Choices

Choice (4) Response

a.

b.

c.

d.

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