Question

3. The reasons of the recoil of gun when fired
1) Before firing, both the bullet and gun are at rest and initial momentum of the
system is zero.
2) As soon as the bullet is fired it moves forward with a large velocity.
3) In order to conserve momentum. The gun moves backward with such a veloc-
ity that the final momentum of the system is zero.
4) All the above.​

Answer 1

ANSWER IS (4)= ALL THE ABOVE

Answer 2

Answer:

Explanation:

Because there is no external force on the gun-bullet system, it would conserve momentum. If the bullet gain momentum in one direction, the gun would gain momentum in the opposite direction.