Answer VerifiedHint: We know that the weight of a body (or a person in this case) is the product of its mass and the acceleration due to gravity. The acceleration due to gravity changes when it moves from the surface of the earth, leading us to take a new value for the acceleration due to gravity. Formula used: \[W = mg\]Complete step by step answer: Hence, the depth below the surface of the earth at which the weight of a person will be one-fourth of his weight at the surface of the earth will be \[4800\,km\]. Note: The value of acceleration due to gravity is changing as it moves from the surface to the interior. This leads us to take a new value for the acceleration due to gravity. Some of us often forget to assign the new value and that in conclusion gives us the wrong answer. |