Physics · LAWS OF MOTION

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. A
   \( 2 \mathbf{F}_{AB} \)
2. B
   \( \mathbf{F}_{AB} \)
3. C
   Infinite
4. D
   Zero