Rigid Bodies

• Uniform: weight acts at the center
• Non-uniform: weight doesn't have to act about the center
• This rigid body is at the point of tilting around A. What is the normal reaction at B?

  0

  
• What are the forces on this rigid body?

  • Weight of the beam
  • normal reaction from A
  • normal reaction from B
  • weight from the 2kg

  
• What are the forces acting in a ladder scenario?

  • weight pushing down
  • wall pushing outwards
  • floor pushing upwards
  • friction pushing right
  • friction pushing up

  
• What are the forces acting in this hinge scenario?

  • tension on the rope
  • weight pulling down
  • wall pushing right
  • vertical force on the hinge

  
• What are the forces acting in this scenario?

  • Normal reaction from the peg
  • Normal reaction from the floor
  • Friction from the floor
  • Weight of the pole