Sir,kindly explain what is different between “Mass and Weight” ?

For all practical purposes, mass and wight mean the same. Scientific definitions, though are different

Mass and weight are related by the equation **Weight = mass x gravity** . You might know this equation as Newton’s II Law of Motion Force = mass x acceleration (F = ma) where Force (or weight) is measure in Newtons, N, and the mass is measured in kilograms, kg.