The motion of center of mass of a system of two particles is unaffected by their internal forces –
A. irrespective of the actual directions of the internal forces
B. only if they are along the line joining the particles
C. only if acts perpendicular to each other
D. only if acting opposite
Answer:A
The motion of center of mass of a system of two particles is unaffected by their internal forces –
A. irrespective of the actual directions of the internal forces B. only if they are along the line joining the particles C. only if acts perpendicular to each other D. only if acting opposite