Question

when bullet is fired from gun, moves little backward this movement of gun is called​

Answer 1

Answer:

recoil

this is tour answer

Answer 2

Answer:

It is due to Newton's Third law

For every action there is an equivalent and opposite reaction..

It also complies with the law of conservation of momentum

Here, the firing of the bullet is the action and recoiling of the gun is the reaction

The speed of the bullet is large but it's mass is small... and gun is much heavier than the bullet.. So the recoiling of the gun is smaller due to law of conservation of momentum

Hope this helps you.. :)