Question

Conservation of linear momentum can be applied only when ?

Answer 1

Momentum Is Conserved in a System. Momentum is mass in motion, and we can apply our understanding of outside forces here as well. Momentum can onlyoccur when there is an outside force or impulse, not from within the system itself. This important concept is called the law ofconservation of momentum.

Answer 2

Extarnal force dose not exist....