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What is the law of conservation of momentum?

Answer 1

#m_1u_1+m_2u_2=m_1v_1+m_2v_2#

if two elastic balls collide horizontally (no other forces affecting at that direction) then the momentum is conserved between them
so if one ball loses speed the other ball will gain speed so the above relation is applied

Example:

as in this examples even though the first ball stopped, its momentum was transmitted to the other ball.

#color(green)("Note:")# the above relation is direction dependant so you suppose one direction to be positive so velocities on that direction is positive while the velocities on the other direction is negative

I hope this helps.

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Answer 2

Axel Acevedo

The law of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it. Mathematically, it can be expressed as the sum of the momenta before an event equals the sum of the momenta after the event. This law is based on Isaac Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.