Forces

Forces:

1. Contact push       Tension is pull force          Spring force          Weight            Normal / Reaction force             Friction          Viscous drag          Upthrust/Buoyancy        Lift force

2. Free body diagram         Net force             

3. Zero net force          Velocity         Galileo Galilei        Invisible forces        

4. Cause and effect concept            Net force and acceleration            Terminal velocity

5. Inclined plane

6. Newton realization for action / reaction         on/by convention       Many bodies dynamics