Flashcards in Friction Deck (23):
-a force that opposes motion
(acts in the opposite direction of motion)
-result of contact with irregular forces
force which must be overcome to start an object moving
force which must be overcome to keep an object moving
Static friction value
Static friction is greater than kinetic friction
Coefficient of Friction
Unit: μ (Mu)
-value defines as the ratio of frictional force to the normal force
What causes the coefficient of friction to change?
it changes depending on the surface
Unit of coefficient of friction
Frictional force formula
Ff = μFn
Relationship between Ff and surface area?
Ff does NOT depend on surface area
What does Ff depend on?
On flat surfaces what is the relationship between Fn and Fg?
What is Fn
force of surface back up on the object
What is Fnet?
what provides an acceleration
(How much they're winning by)
To calculate, subtract the two forces
How to calculate coeff of friction?
Newton's second law
Normal force are always directed
perpendicular to the surface
At rest what is the relationship between Ff and FgII
Force due to gravity is always
Mass is always ...
the same on earth or in space
Formula of Fg II
Fg sin Θ
Formula of Fg ⊥
Fg cos Θ
On a frictionless surface, what is the relationship between FgII and Fnet
FgII = Fnet