Question

Man drawing water from awell suddenly rope snaps and he falls down this explain by newtons which law

Answer 1

Hello mate,

Here is your answer,

According to Newton's 3rd law of motion " for every action there is a equal and opposite reaction."  

Meaning pulling up on a rope that has a bucket full of water at the end of it, so the action is upward. When the rope breaks the bucket full of water falls, the opposite reaction is for him to fall backwards since he has a holding  the other end of the rope.