Two particles A and B are initially separated by a distance of 1.0 m and are at rest. The mass of A is 100 gm and that of B is 30.0 gm and they move under a constant mutual attractive force of 0.02 N .At what distance from the A's original position do the particles collide.

Two particles A and B are initially separated by a distance of 1.0 m a

1.	Two particles A and B are initially separated by a distance of 1.0 m and are at rest. The mass of A is 100 gm and that of B is 30.0 gm and they move under a constant mutual attractive force of 0.02 N .At what distance from the A's original position do the particles collide.
Answer» Solution :No EXTERNAL force ACTS. So the C.M. is at REST. They COLLIDE, at the C.M. `x = m_(1)x_(1) + m_(2)x_(2)//m_(1) + m_(2)=0 + 0.3 xx 1//0.4 = 0.75 m`