Reaction force equals action force¶

Newton’s third law of motion states that for every action there is an equal and opposite reaction. Namely, if two bodies exert forces on each other, these forces have the same magnitude but opposite directions.

Links:

Physics LibreTexts, green box.

action_force¶: The projection of the force that the first body exerts on the second body.

Symbol:: F_12
Latex:: \(F_{12}\)
Dimension:: force

reaction_force¶: The projection of the force that the second body exerts on the first body.

Symbol:: F_21
Latex:: \(F_{21}\)
Dimension:: force

law¶

F_12 = -1 * F_21

Latex:: \[F_{12} = - F_{21}\]