Question

the principle of conservation of linear momentum states that the linear momentum of a system
(a) cannot be changed
(b) cannot remain constant
(c) can be changed if only an internal force act .
(d)can be changed only if external force act.
ans..​

Answer 1

Answer:

I think ans is d........

if a external nonzero force is applied on a system then only linear momentum changes.........

Answer 2

Answer:

the correct answer is d)