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