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3 particles A,B and each of mass m lies on vertices of an equilateral traingle of side a.The system is released from rest.Calculate the net momentum of two particles A and B,when seperation between the particles become a/2 Ans-(2Gm 3 /a) 1/2

3 particles A,B and each of mass m lies on vertices of an equilateral traingle of side a.The system is released from rest.Calculate the net momentum of two particles A and B,when seperation between the particles become a/2
Ans-(2Gm3/a)1/2

Grade:12th pass

1 Answers

Shivansh
askIITians Faculty 267 Points
5 years ago
The net momentum of all three particles will be zero for all moments. But the sum of any two will be equal and opposite of the third. So we will just fund it for one particle and use negative sign on it.
Potential energy change will be-
(4Gm2/a) – (2Gm2/a) = p2/2m
this gives p

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