Answer :

lavanyaande

The person walking down the sidewalk follows the newton's third law of motion.

Explanation:

  • A person is able to walk down the sidewalk by using the reaction forces from the ground.
  • In simple term, feet pushes the ground and the reaction forces makes the feet able to walk.
  • Another important force included in the walking mechanism is friction. With out friction one cannot walk down the sidewalks.
  • Hence the forces involved in the walking of a person down the sidewalk are:
  1. Friction force
  2. Action and reaction force between ground and person's feet.

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