Momentum

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Physics Newtonian Mechanics Momentum

	Conservation of Momentum:
	When two or more objects interact with each other in an isolated manner, the total momentum of the system before and after the interaction are same. For a two particle (1 and 2) system where the particles interact with each other being isolated from the surroundings so that no external forces act on it, the conservation of momentum is given as follows: Because the time derivative of total momentum p_tot=p₁+p₂ is zero, we conclude that the total momentum of the system must remain constant: where p_li and p_2i are the initial values and p_1f and p_2f the final values of the momentum during the time interval dt over which the reaction pair interacts. It is worth noting that the linear momentum is conserved separately along x, y and z directions.