Rotational Motion (NEET Physics): Questions 110 - 114 of 123

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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 L4 from one end is

Choices

Choice (4) Response

a.

7ML224

b.

7ML248

c.

ML26

d.

ML212

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,

A merry-go-round is pushed by a boy

A Merry-Go-Round Is Pushed by a Boy

Figure shows a merry-go-round of radius 3 m is pushed with force 50 N.

Choices

Choice (4) Response

a.

40 Nm

b.

141 Nm

c.

135 Nm

d.

0 Nm

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.

L2mr2

b.

L2mr3

c.

L2mr

d.

L2mr

Question number: 113

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length l and height h. What is the speed of its centre of mass when the cylinder reaches its bottom?

Choices

Choice (4) Response

a.

43gh

b.

2gh

c.

4gh

d.

34gh

Question number: 114

» Rotational Motion » Torque

MCQ▾

Question

The torque of force (3i^+4j^+2k^) newton acting at a point is: (Given: position vector of point is (2i^2j^+4k^) meter)

Choices

Choice (4) Response

a.

6j^

b.

20i^8j^+14k^

c.

17i^+6j^+13k^

d.

13k^

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