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Pls solve question no. 13 and also explain why answer does not depend on which particle posses what velocity ( i mean why answer would be same whether a partice posses v1 celocity and other posees v2 velocity and vice versa)

Pls solve question no. 13 and also explain why answer does not depend on which particle posses what velocity ( i mean why answer would be same whether a partice posses v1 celocity and other posees v2 velocity and vice versa)

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Grade:12th pass

1 Answers

Saurav
224 Points
5 years ago
Ans is 5m,4m,7m
See here masses are equal  so it doesn't depend on which particle possess which velocity
There are two methods
M1
Initially com is 4m,3m,7m
Now velocity of com is( 2i +2j)/2   as masses are equal
So after 1s com travelled 1m,1m,0m
Therefore new com will be 5m,4m,7m
 
M2
Finally position of 1 will be 2+2m,4m,6m
And that of 2 will be 6m,2+2m,8m
Now com will be( 10m,8m,14m)/2
That is same as earlier
Hope this helps u 😁
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