Question

derive law of conservation of linear momentum from Newton's third law of motion.

Answer 1

There are two principles at work here:Newton's Third Law of Motion and theconservation of momentum. Newton's Third Law states that for every action, there is an equal and opposite reaction. If you push against a wall, the wall pushes back against you with the same amount of force.

Answer 2

for every action there is a reaction 3rd law of motion