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STATICS part 1 (3D Force Vectors (support reactions (roller, ball and…

- - - - Coplanar
      - Parallel
        
        forces are parallel and out of the page
        
        results in moment about z axis
      - Concurrent
        
        all forces go through one point
        
        no moment is generated, only force resultant
      - Solving for systems:
        
        find POI
        
        resolve forces to components
        
        calc, total moment about POI
        
        sum all resultants forces
        
        place resultant force at POI
        
        further reduce couple system to single force system (move Fr by appropriate lever arm)
- - - - roller/pin confined in smooth slot
      - smooth contacting surface
      - rocker
      - roller
      - member pin connected to collar on smooth rod
    - - smooth pin/hinge
    - - member fixed to collar on smooth rod
      - fixed
  - - - forces need to be equal and opposite
      - forces need to share the same line of action
      - forces are applied at only two points in the member
    - - member subjected to only 3 distinct forces (not lined up)
      - all forces are concurrent or parallel
- - - - no external load
      - OR no support reaction
      - non-collinear
    - - two collinear members
      - no external reaction along third member
- - - - does not have mass or size
      - concurrent forces acting on it