A bob is whirled in a horizontal plane by means of a string with an initial speed of <math> <mrow><mi>ω</mi>rpm</mrow> </math> . The tension in the string is <math> <mrow> <mi>T</mi> </mrow> </math> . If speed becomes <math> <mrow> <mn>2</mn> <mi>ω</mi> </mrow> </math> while keeping the same radius, the tension in the string becomes:

T = m ? ^ ω 2 <!- [endif]-><!- [if gte mso 9]><xml> </xml><! [endif]-> T ′ = m : ( 2 ω ) 2 <!- [endif]-><!- [if gte mso 9]><xml> </xml><! [endif]-> T ′ = 4 T <!- [endif]-><!- [if gte mso 9]><xml> </xml><! [endif]->

A bob is whirled in a horizontal plane by means of a string with an initial speed of <math> <mrow><mi>ω</mi>rpm</mrow> </math> . The tension in the string is <math> <mrow> <mi>T</mi> </mrow> </math> . If speed becomes <math> <mrow> <mn>2</mn> <mi>ω</mi> </mrow> </math> &nbsp;while keeping the same radius, the tension in the string becomes:

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Physics Class 11th Physics Oscillations

A bob is whirled in a horizontal plane by means of a string with an initial speed of $ω rpm$ . The tension in the string is $T$ . If speed becomes $2 ω$ while keeping the same radius, the tension in the string becomes:

Option 1 -

$T$

Option 2 -

$4 T$

Option 3 -

$\frac{T}{4}$

Option 4 -

$\sqrt[]{2} T$

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Answered by

alok kumar singh | Contributor-Level 10

a month ago

Correct Option - 2

Detailed Solution:

$T = m \hat{?} ω^{2}$

$T^{'} = m : {(2 ω)}^{2}$

$T^{'} = 4 T$

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A bob is whirled in a horizontal plane by means of a string with an initial speed of $ω rpm$ . The tension in the string is $T$ . If speed becomes $2 ω$ while keeping the same radius, the tension in the string becomes:

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A bob is whirled in a horizontal plane by means of a string with an initial speed of ωrpm . The tension in the string is T . If speed becomes 2 ω while keeping the same radius, the tension in the string becomes:

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A bob is whirled in a horizontal plane by means of a string with an initial speed of $ω rpm$ . The tension in the string is $T$ . If speed becomes $2 ω$ while keeping the same radius, the tension in the string becomes: