P is the centre of mass of a system of four point masses A,B,C and D, which are coplanar but not collinear. (a) P may or may not coincide with one of the point masses (b) P must lie within or on the edge of atleast one of the triangles formed by taking A,B, C and D three at a time (c ) P must lie on a line joining two of the points A,B,C,D (d ) P lies out side the quadrangle ABCD

P is the centre of mass of a system of four point masses A,B,C and D,

1.	P is the centre of mass of a system of four point masses A,B,C and D, which are coplanar but not collinear. (a) P may or may not coincide with one of the point masses (b) P must lie within or on the edge of atleast one of the triangles formed by taking A,B, C and D three at a time (c ) P must lie on a line joining two of the points A,B,C,D (d ) P lies out side the quadrangle ABCD
Answer» a & b are correct C & d are correct a & c are correct b & d are correct Answer :A