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Question (31)

QN0035369

A solid cylinder of mass and radius is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Here revolutions (given)

As so

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Question (32)

QN0035370

A wheel rotates with a constant acceleration of . If the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately

(A)
8
(B)
16
(C)
24
(D)
32

Correct Answer: B

Explanation:

Number of revolutions (approx.)

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Question (33)

QN0035371

A fly wheel is accelerated uniformly from rest and rotates through in the first second. The angle rotated by the fly wheel in the next second, will be :

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

We have

Here, and

Now,

.

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Question (34)

QN0035372

Around a hollow cylinder of mass and radius a rope is wounded. If a rope is pulled with a force of , the angular acceleration of the cylinder is

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

revolutions

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Question (35)

QN0035373

A wheel is rotating at about its own axis. When the power is switched off, it comes to rest in 2 minutes. Then the angular retardation in is

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Given, no. of rotation

Time, minutes

Final angular speed (as wheel comes to rest)

Angular retardation

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Question (36)

QN0035374

A body rotating with uniform acceleration about its geometrical axis makes 8 rotations in the first 2 seconds. The number of rotations the body makes in the next 3 seconds is
(Initially the body is at rest)

(A)
50
(B)
25
(C)
42
(D)
21

Correct Answer: A

Explanation:

By equation of motion

Here, angular velocity,

Divide equation (ii) by (i)

rotations

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Question (31)

A solid cylinder of mass and radius is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions is

Explanation:

Link:

Question (32)

A wheel rotates with a constant acceleration of . If the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately

Explanation:

Link:

Question (33)

A fly wheel is accelerated uniformly from rest and rotates through in the first second. The angle rotated by the fly wheel in the next second, will be :

Explanation:

Link:

Question (34)

Around a hollow cylinder of mass and radius a rope is wounded. If a rope is pulled with a force of , the angular acceleration of the cylinder is

Explanation:

Link:

Question (35)

A wheel is rotating at about its own axis. When the power is switched off, it comes to rest in 2 minutes. Then the angular retardation in is

Explanation:

Link:

Question (36)

A body rotating with uniform acceleration about its geometrical axis makes 8 rotations in the first 2 seconds. The number of rotations the body makes in the next 3 seconds is
(Initially the body is at rest)

Explanation:

Link:

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Question (31)

A solid cylinder of mass and radius is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions is

Explanation:

Link:

Question (32)

A wheel rotates with a constant acceleration of . If the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately

Explanation:

Link:

Question (33)

A fly wheel is accelerated uniformly from rest and rotates through in the first second. The angle rotated by the fly wheel in the next second, will be :

Explanation:

Link:

Question (34)

Around a hollow cylinder of mass and radius a rope is wounded. If a rope is pulled with a force of , the angular acceleration of the cylinder is

Explanation:

Link:

Question (35)

A wheel is rotating at about its own axis. When the power is switched off, it comes to rest in 2 minutes. Then the angular retardation in is

Explanation:

Link:

Question (36)

A body rotating with uniform acceleration about its geometrical axis makes 8 rotations in the first 2 seconds. The number of rotations the body makes in the next 3 seconds is (Initially the body is at rest)

Explanation:

Link:

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ExcelWithTutors

For Student

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Learn

OUR POLICY

A body rotating with uniform acceleration about its geometrical axis makes 8 rotations in the first 2 seconds. The number of rotations the body makes in the next 3 seconds is
(Initially the body is at rest)