What is friction?[]
Friction is a force, affects motion. Friction acts on materials in contact with another, or acts in different direction in opposite motion.
What does the force of friction depend on?[]
- Kinds of materials in contact
- How much surfaces pressed together
..such as Rubber vs. Concrete, and not Steel vs. Steel (Rubber vs. Concrete > Steel vs. Steel)
Static Friction[]
- Opposes movement of stationary object
- Moving furniture
- Hardest part getting moving
Kinetic Friction[]
- Acts on objects in motion
- Once object begins moving, less force to keep in motion
- Sliding, Rolling, Fluid
Sliding Friction[]
Basketball shoes prevent slipping, relation to Sliding Friction
- Two objects slide past one another
- Basketball shoes prevent slipping
Rolling Friction[]
- Objects such as wheel or ball rolls across surface
- Easier to overcome than sliding friction
Fluid Friction[]
Boy with a helmet, on training wheels, relation to Fluid Friction
- Solid objects move through fluids
- Cyclists use aerodynamic and spandex to reduce friction
Air Resistance[]
- Friction acting on something moving through air
- Don't notice unless at high speed.