1. Physics

2.  Kinematics  Describing motion without referring to the cause  Ex: time, position, velocity, etc.  Kinetics  Describing motion by referring to the cause  Forces

3.  Applied force  Weight  Normal  Tension  Friction  Spring  Buoyancy  Thrust  Lift  Drag  Magnetic  Electric  & more!

4.  Contact force  Perpendicular to the surface of contact

5.  Contact force  Exists in taunt ropes, strings, cords, cables, etc.  Directed along the tether  Can only pull, not push

6.  Contact force  Resists motion  Opposes motion along surfaces  Directed parallel to the surfaces of contact  Depends on texture & load

7.  Non-contact  The force due to gravity  Note: gravity itself is not a force  Long-range attraction between objects

8.  Mass  Constant, physical property of an object.  Weight  A measure of how much gravity affects an object.

9.  Contact force  The generic term used to describe a physical push or a pull on an object

10.  Line of action