There are not any intermolecular attractions between the molecules.The volume of a molecule is negligible, compared with the quantity of the container.The collision between the molecules and therefore the refore the between them and the walls of the container are perfectly elastic. The molecules of a specific gas are identical and in random motion.The mutual interaction is that the only force working on the bodies these sort of bodies is made thermal system.Īccording to law of conservation of Momentum the resultant of Momentum of two or more bodies inside the thermal system remains conserved within the absence of any net external force.Įxample - Recoil of Gun - When the gun is at rest the entire momentum of the gun is zero and when gun fires the bullet there's an interactive force between the bullet and gun and hence there total momentum remain conserved.Īlthough their number may vary, the core message is that the same. It is observe that whenever two or more bodies interact with each other the resultant of theīody remains unchanged. Whenever a body is move during a line with reference to another body an opposite force is working on the thing to prevent it's motion this force is understood because the frictional force.
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