Conservation of linear momentum is equivalent to

Question

Conservation of linear momentum is equivalent to (A) Newton’s law of gravity (B) Newton’s first law of motion (C) Newton’s second law of motion (D) Newton’s third law of motion

Tardigrade Admin · Accepted Answer

Let there be many particles in a system and they apply internal forces on each other and change each other's momentum. By newton's 3rd law, the forces will be equal and opposite and change the momentum by equal and opposite (increase or decrease) amount. Hence 3rd law implies conservation of momentum.

Q. Conservation of linear momentum is equivalent to

Newton’s law of gravity

Newton’s first law of motion

Newton’s second law of motion

Newton’s third law of motion