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Wednesday, 12 December 2018

As you go down into a well, your weight

  By GK Planet Team       Wednesday, 12 December 2018
Q. As you go down into a well, your weight
  1. increases slightly
  2. decreases slightly
  3. remains exactly the same
  4. None of the above
Answer: Decreases slightly
  • The standard value of 9.8 ms–2 refers to the Earth as a homogeneous sphere, but in reality, there are many reasons for this value to range from a minimum of 9.78 ms–2 at the Equator to a maximum of 9.83 ms–2 at the poles.
  • The gravitational force at the earth’s center is zero.
as we go down into a well, our weight will decrease slightly
  • The further you go away from earth, lesser the gravitational force you experience. And closer you come to the surface of the earth, more gravitational force acts on you. This is because of the inverse square law.
  • But as you keep on moving towards the center of the earth, the gravitational force acting, by the virtue of earth’s mass, on you will gradually abate and ultimately go zero once you reach the earth’s center. Not because there is no gravitational force down there but because at the center you will be completely surrounded or enveloped by earth, as a result, you will be pulled by equal forces in all directions. Hence all the gravitational force lines will cancel out each other leaving you with zero net force.
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Thanks for reading As you go down into a well, your weight

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