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Physics · LAWS OF MOTION

हिन्दी

A stone of mass \( m \) is pulled downwards towards the Earth due to gravity. The force exerted by the stone on the Earth is equal to:

  1. \( mg \), directed upwards towards the stone
  2. Zero, because the Earth's mass is extremely large
  3. Less than \( mg \), but greater than zero
  4. Greater than \( mg \), owing to the giant mass of Earth

Correct answer · Option 1

\( mg \), directed upwards towards the stone

Explanation

By Newton's third law, the force exerted by the stone on the Earth is equal in magnitude (\( mg \)) and opposite in direction (upwards) to the force exerted by the Earth on the stone.

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