Centering a mass #1

Classical Mechanics Level 1

Two particles A A and B B , initially at rest, move towards each other by mutual force of attraction. At the instant, when the speed of A A is v v and the speed of B B is 2 v 2v , the speed of the centre of mass of the system is:-

Zero v v 5 v 5v 2.5 v 2.5v 6 v 6v 3 v 3v

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Parag Zode by Parag Zode , 24, India

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2 solutions

Parag Zode
Mar 25, 2015

Net force on centre of mass is always zero \text{zero} . Therefore, centre of mass always remain on rest \text{rest} . ⌣ ¨ \ddot\smile

2 Helpful 0 Interesting 0 Brilliant 0 Confused

⌣ ¨ \huge{\ddot\smile}

Md Zuhair - 4 years, 3 months ago
Adarsh Kumar
May 14, 2020

Force is internal so motion of com is zero

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