Four identical particles of equal masses 1kg made to move along the circumference of a circle of radius 1m under the actin of their own mutual gravitational attraction. The speed of each particle will be:

Option 1 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <mfrac> <mrow> <mroot> <mrow> <mrow> <mo>(</mo> <mrow> <mn>1</mn> <mo>+</mo> <mn>2</mn> <mroot> <mrow> <mn>2</mn> </mrow> <mrow></mrow> </mroot> </mrow> <mo>)</mo> </mrow> <mi>G</mi> </mrow> <mrow></mrow> </mroot> </mrow> <mrow> <mn>2</mn> </mrow> </mfrac> </mrow> </math> </span></p>
Option 2 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <mroot> <mrow> <mfrac> <mrow> <mi>G</mi> </mrow> <mrow> <mn>2</mn> </mrow> </mfrac> <mrow> <mo>(</mo> <mrow> <mn>1</mn> <mo>+</mo> <mn>2</mn> <mroot> <mrow> <mn>2</mn> </mrow> <mrow></mrow> </mroot> </mrow> <mo>)</mo> </mrow> </mrow> <mrow></mrow> </mroot> </mrow> </math> </span></p>
Option 3 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <mroot> <mrow> <mfrac> <mrow> <mi>G</mi> </mrow> <mrow> <mn>2</mn> </mrow> </mfrac> <mrow> <mo>(</mo> <mrow> <mn>2</mn> <mroot> <mrow> <mn>2</mn> </mrow> <mrow></mrow> </mroot> <mo>−</mo> <mn>1</mn> </mrow> <mo>)</mo> </mrow> </mrow> <mrow></mrow> </mroot> </mrow> </math> </span></p>
Option 4 - <p><span class="mathml" contenteditable="false"> <math> <mrow> <mroot> <mrow> <mi>G</mi> <mrow> <mo>(</mo> <mrow> <mn>1</mn> <mo>+</mo> <mn>2</mn> <mroot> <mrow> <mn>2</mn> </mrow> <mrow></mrow> </mroot> </mrow> <mo>)</mo> </mrow> </mrow> <mrow></mrow> </mroot> </mrow> </math> </span></p>
2 Views|Posted 4 months ago
Asked by Shiksha User
1 Answer
V
4 months ago
Correct Option - 1
Detailed Solution:

F 1 c o s 4 5 ° + F 2 c o s 4 5 ° + F 3 = m v 2 r

G m 2 ( 2 r ) 2 . 1 2 + G m 2 ( 2 r ) 2 . 1 2 + G m 2 ( 2 r ) 2 = m v 2 r

v = G m 4 r ( 2 2 + 1 )

Putting m = 1 kg and r = 1 m,

v = 1 2 G ( 1 + 2 2 )

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Physics Gravitation 2025

Physics Gravitation 2025

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