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Concepts Of Physics MCQ Edition [Volume 1]PhysicsThe Forces

Determine the force with which you attract the earth.

Options

  1. AZero
  2. BEqual to the earth's weight
  3. CNegligibly small but non-zero
  4. DEqual to your weight

Correct answer

D. Equal to your weight

Step-by-step solution

According to Newton's law of universal gravitation, the gravitational force between two masses M and m separated by a distance r is given by F = GMm r^2 . This force is mutual and equal in magnitude for both bodies. The force with which the earth attracts a person is defined as the weight of the person. By Newton's third law of motion, the person exerts an equal and opposite force on the earth. Therefore, the force with which you attract the earth is exactly equal to your weight.

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