NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2029 - 2032 of 2184

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Question number: 2029

» Rotational Motion » Torque

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MCQ▾

Question

A flywheel of mass 25 kg has a radius of 0.3 m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 4 rad s -2?

Choices

Choice (4) Response

a.

11.2 N

b.

6.8 N

c.

2.6 N

d.

7.5 N

Question number: 2030

» Rotational Motion » Moment of Inertia

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Assertion-Reason▾

Question

Assertion (Ꭺ)

If two different axes are at same distance from the centre of mass of a rigid body, then moment of inertia of the given rigid body about both the axes will always be the same.

Reason (Ꭱ)

From parallel axis theorem, where all terms have usual meaning.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 2031

» Rotational Motion » Torque

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MCQ▾

Question

The torque required to stop a wheel of moment of inertia from a speed of 40 rad s -1 in 10 s is,

Choices

Choice (4) Response

a.

8 ⨯ 10 -3 Nm

b.

8 Nm

c.

0.8 Nm

d.

0.08 Nm

Question number: 2032

» Rotational Motion » Concepts of Rotational Motion

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MCQ▾

Question

A solid sphere is rolling on a frictionless surface shown in figure with a transnational velocity v m/s. If sphere climbs up to height h then value of v should be

Rolling sphere which is supposed to climb on height h

Rolling Sphere Which is Supposed to Climb on Height H

Solid sphere is rolling on a frictionless surface shown in figure with a transnational velocity v m/s

Choices

Choice (4) Response

a.

2gh

b.

c.

d.