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

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Presentation transcript:

Physics

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

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

 Contact force  Perpendicular to the surface of contact

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

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

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

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

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

 Line of action