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Physics · LAWS OF MOTION

हिन्दी

Two interacting bodies forming an isolated system exert internal forces \( \mathbf{F}_{AB} \) and \( \mathbf{F}_{BA} \) on each other. The net force on the two-body system as a whole is:

  1. \( 2 \mathbf{F}_{AB} \)
  2. \( \mathbf{F}_{AB} \)
  3. Infinite
  4. Zero

Correct answer · Option 4

Zero

Explanation

Internal forces cancel in pairs (\( \mathbf{F}_{AB} + \mathbf{F}_{BA} = 0 \)), so the net force on the entire system is zero.
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