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▾

Question

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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