NoQ..3.10: - State the law of conservation of linear momentum, pointing out the importance of isolated system. Explain, why under certain conditions, the law is useful even though the system is not completely isolated?

NoQ..3.10: - State the law of conservation of linear momentum, pointing out the importance of isolated system. Explain, why under certain conditions, the law is useful even though the system is not completely isolated?

Ans: - Statement:-

                       It states that the total linear momentum of an isolated system always remains constant.

            Isolated system is important in many respects we study the properties of gases in an isolated system. Firing a bullet from a gun, the shooting of missile etc… The isolated system is an ideal system and such ideal systems do not exist. The momentum tells us about the motion of the bodies. So if we want to know the motion of bodies then we use this law and ignore the external force on the system.