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P is the centre of mass of four point ma...

P is the centre of mass of four point masses A,B, C and D which are lying in the same length but not along the same straight line then.

A

`P` must lie with in the quadrilateral `ABCD`.

B

`P` may or may not cincide with one of the point masses.

C

`P` must lie on a joining two of the points `A,B,C,D`

D

`P` may lie outside the quadrilateral `ABCD`.

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