A particle is projected with velocity v0 along x-axis. A damping force is acting on the particle which is proportional to the square of the distance from the origin i.e. ma = - αx2. The distance at which the particle stops:

Option 1 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <msup> <mrow> <mrow> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>2</mn> <msub> <mrow> <mi>v</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> </mrow> <mrow> <mn>3</mn> <mi>α</mi> </mrow> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <mfrac> <mrow> <mn>1</mn> </mrow> <mrow> <mn>3</mn> </mrow> </mfrac> </mrow> </msup> </mrow> </math> </span></p>
Option 2 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <msup> <mrow> <mrow> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>3</mn> <msubsup> <mrow> <mi>v</mi> </mrow> <mrow> <mn>0</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msubsup> </mrow> <mrow> <mn>2</mn> <mi>α</mi> </mrow> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <mfrac> <mrow> <mn>1</mn> </mrow> <mrow> <mn>2</mn> </mrow> </mfrac> </mrow> </msup> </mrow> </math> </span></p>
Option 3 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <msup> <mrow> <mrow> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>2</mn> <msubsup> <mrow> <mi>v</mi> </mrow> <mrow> <mn>0</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msubsup> </mrow> <mrow> <mn>3</mn> <mi>α</mi> </mrow> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <mfrac> <mrow> <mn>1</mn> </mrow> <mrow> <mn>2</mn> </mrow> </mfrac> </mrow> </msup> </mrow> </math> </span></p>
Option 4 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <msup> <mrow> <mrow> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>3</mn> <msubsup> <mrow> <mi>v</mi> </mrow> <mrow> <mn>0</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msubsup> </mrow> <mrow> <mn>2</mn> <mi>α</mi> </mrow> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <mfrac> <mrow> <mn>1</mn> </mrow> <mrow> <mn>3</mn> </mrow> </mfrac> </mrow> </msup> </mrow> </math> </span></p>
2 Views|Posted 7 months ago
Asked by Shiksha User
1 Answer
V
7 months ago
Correct Option - 4
Detailed Solution:

F = α x 2 m v d v d x = α x 2

v 0 0 v d v = α m 0 x x 2 d x 0 2 2 v 0 2 2 = α 3 m x 3

v 0 2 2 = α 3 m x 3 x = ( 3 v 0 2 m 2 α ) 1 / 3

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Physics Work, Energy and Power 2021

Physics Work, Energy and Power 2021

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