Friction makes it possible: :
Friction makes it possible: To walk
Use wheeled vehicles
Sit
Hold books
Slide 3:
Friction is a force that occurs when 2 surfaces oppose each other.
Slide 4:
Rub your hands together to produce friction.
Types of friction :
Types of friction Static
Sliding
Rolling
Fluid
Static :
Static Friction that acts on something that is not moving
Piano is held in place by static friction
Static friction keeps you in your seat
No heat or wear is generated
Sliding :
Sliding Force resulting when pushing or pulling an object over a surface.
Moving day—pushing a box across the floor
Heat and wear can result
Rolling :
Rolling Contact is reduced because of rollers or wheels or ball bearings.
Skate boards have ball bearings in the wheels.
A cart has wheels.
Less heat and wear will result.
Fluid friction :
Fluid friction Resistance from a “liquid” or air.
Stirring a thick batter
Walking through water
Olympic bike riders
Reducing friction :
Reducing friction A smooth surface does demonstrate as much friction as a rough surface.
A lubricant can be used to reduce friction.