rolling sliding fluid smooth the surface ice glass tile weight friction force increases as the speed of the object increases RF ex. riding a bike, bowling surfaces in contact are at rest friction FF ex. airplane, swimmer gravity ex. SF combing hair, writing Law of Universal Gravitation replace sliding with rolling surfaces in motion sandpaper carpet gravel mass add a lubricant like oil, wax or grease friction harmful direction ex. SF a book resting on a desk static less force pushing together friction helpful move through liquid or gas rolling sliding fluid smooth the surface ice glass tile weight friction force increases as the speed of the object increases RF ex. riding a bike, bowling surfaces in contact are at rest friction FF ex. airplane, swimmer gravity ex. SF combing hair, writing Law of Universal Gravitation replace sliding with rolling surfaces in motion sandpaper carpet gravel mass add a lubricant like oil, wax or grease friction harmful direction ex. SF a book resting on a desk static less force pushing together friction helpful move through liquid or gas
(Print)
rolling
sliding
fluid
smooth the surface
ice
glass tile
weight
friction
force
increases as the speed of the object increases
RF ex. riding a bike, bowling
surfaces in contact are at rest
friction
FF ex. airplane, swimmer
gravity
ex. SF combing hair, writing
Law of Universal Gravitation
replace sliding with rolling
surfaces in motion
sandpaper carpet
gravel
mass
add a lubricant like oil, wax or grease
friction harmful
direction
ex. SF a book resting on a desk
static
less force pushing together
friction helpful
move through liquid or gas
