A point mass of \(10 \mathrm{~kg}\) is placed at the centre of earth. The weight of the point mass is

A point mass of \(10 \mathrm{~kg}\) is placed at the centre of earth. The weight of the point mass is
  1. zero
  2. \(98 \mathrm{~N}\)
  3. \(49 \mathrm{~N}\)
  4. \(10 \mathrm{~N}\)

Solution

At the centre of earth, gravitational acceleration \(g\) is zero. Hence, weight of point mass, \(w=m g=10 \times 0=0\)

Asked in: AP EAMCET 2020 (21 Sep Shift 1)

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