Question

When a gun is fired,the person handling the gun should immediately move in backward direction, why?

Answer 1

the force applied by gun is not so capable to move the person in three kind of Forces 1 gravitational force another is the muscular force and the third is the frictional force

Answer 2

When a gun is fired,the person handling the gun should immediately move in backward direction, because due to the Newton's third law every action has equal and opposite reaction.