For a system to follow the law of conservation of linear momentum during a collision, the condition is (a) total external force acting on the system is zero(b) total external force acting on the system is finite and time of collision is negligible(c ) total internal force acting on the system is zero.

For a system to follow the law of conservation of linear momentum duri

1.	For a system to follow the law of conservation of linear momentum during a collision, the condition is (a) total external force acting on the system is zero(b) total external force acting on the system is finite and time of collision is negligible(c ) total internal force acting on the system is zero.
Answer» (a) only (B) only (C ) only (a) or (b) ANSWER :A