[2.4] Friction

• FRICTION


  Caused by the irregularities in the surfaces in mutual contact, and it depends on the kinds of material and how much they are pressed together.
• CHARACTERISTICS OF FRICTION

  1. Parallel to the contact surface between systems and always in a direction opposing motion.
  2. Does not depend on the speed.
  3. Does not depend on the surface area of contact.
• TYPES OF FRICTION

  1. Static Friction
  2. Kinetic or Sliding Friction
  3. Rolling Friction
  4. Fluid Friction
• ROLLING FRICTION


  Force resists the motion when a body (such as a ball, tire, or wheel) rolls on a surface.
• FLUID FRICTION


  Occurs as an object pushes aside the fluid it is moving through.