654 B
654 B
Force and Translational Dynamics
Each force has an equal and opposite reaction.
If I push a wall with 50N's, it'll push back with 50N's, called an action reaction pair.
In formula format it's F_{AB}=-F_{BA}. The negative sign shows the forces point in opposite directions.
This also means that if 2 objects push off each other their COM doesn't change.
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Tension
Tension is a force applied by flexible connectors.
An ideal yisang string is one with negligible mass and does not stretch. In these ideal strings tension is equal throughout, in non ideals tension differs in different parts.