Multiple choice

The weight of an object would be minimum when it is placed ________.

  1. at the north pole

  2. at the south pole

  3. at the equator

  4. at the centre of the earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Weight is minimum (zero) at Earth's center because gravitational forces from all surrounding mass cancel completely. At the poles (A and B), weight is maximum due to no centrifugal reduction. At the equator (C), weight is slightly less than at poles due to centrifugal force from Earth's rotation, but still much more than zero at the center.

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