Assertion: For looping a vertical loop of radius r , the minimum velocity at the lowest point should be 5 gr Reason: Velocity at the highest point would be zero.

Assertion is True, Reason is False.

Assertion is True, Reason is True; Reason is a correct explanation for Assertion.

Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.

Assertion is False but Reason is True.

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A frictionless track $A B C D E$ ends in a circular loop of radius $R .$ A body slides down the track from the point $A$ which is at a height $h = 5 cm .$ Maximum value of $R$ for the body to successfully complete the loop is

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Important Questions on Circular Motion

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 88

Assertion: For looping a vertical loop of radius $r,$ the minimum velocity at the lowest point should be $\sqrt{5 gr}$

Reason: Velocity at the highest point would be zero.

EASY

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 89

A flywheel at rest is reached to an angular velocity of

36 rad s^{- 1}

6 s

with a constant angular acceleration. The total angle turned during this interval is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 90

An engine requires

5 s

to go from a speed of

600 rpm

1200 rpm

with constant acceleration. How many revolutions does it make in this period?

EASY

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 91

A wheel of a vehicle is rotated to a uniform angular acceleration about its axis. Initially its angular velocity is zero. It rotates through an angle

θ_{1}

in the first

2 s

and in the next

3 s,

it rotates through an additional angle

θ_{2} .

The ratio of

\frac{θ_{2}}{θ_{1}}

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 92

When a ceiling fan is switched off, its angular velocity reduces to

50 %

while it makes

36

rotations. How many more rotations will it make before coming to rest? (Assume uniform angular retardation)

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 93

A particle is moving in a circle of radius $r$ centered at $O$ with constant speed $v .$ What is the change in velocity in moving from $A$ to $B$ if $∠ AOB = 60 ° ?$

Question Image

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 94

A particle moves along a circle of radius

\frac{20}{π} m

with a constant tangential acceleration. If the velocity of the particle is

80 m s^{- 1}

at the end of the

2^{nd}

revolution after motion has begun, the tangential acceleration is

HARD

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IMPORTANT

MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 9 - Circular Motion>Critical Thinking>Q 95

A stone of mass

1 kg

tied to a light inextensible string of length

(10 / 3) m

is whirling in a circular path in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension is

4

and if

g

is taken to be

10 m s^{- 2},

the speed of the stone at the highest point of the circle is

A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from the point A which is at a height h=5 cm. Maximum value of R for the body to successfully complete the loop is

Important Questions on Circular Motion

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A frictionless track $A B C D E$ ends in a circular loop of radius $R .$ A body slides down the track from the point $A$ which is at a height $h = 5 cm .$ Maximum value of $R$ for the body to successfully complete the loop is