Question

why a gun recoil when fired​

Answer 1

Answer:

because of the third law of motion

"every action has an equal and opposite reaction"

the pressure of bullet is so high that the gun has to recoil its velocity

Answer 2

Answer:

According to 3rd law of motion,"Every action has an equal and opposite reaction"

When a gun is fired, it exerts a forward force on the bullet. The bullet exerts an equal and opposite reaction force on the gun. This results in the recoil of gun.

I hope this will help you...