NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2042 - 2045 of 2184

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Question number: 2042

» Rotational Motion » Moment of Inertia

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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.

Question number: 2043

» Rotational Motion » Torque

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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.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 2044

» Rotational Motion » Moment of Inertia

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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.

Question number: 2045

» Rotational Motion » Torque

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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.

0 Nm

c.

135 Nm

d.

141 Nm