A frictional force (given by g(x,y,z) = arcsinwt + volume/dispersive Force) and an introvertial force (given by I = 4-dimensional area/ combination of n,m random variables squared).
They're both forms of static friction.
the friction and the motion of the ball both combined
If both of the surfaces on which friction is to be created are very rough, the friction will be more. The more rough the surfaces more friction we have.
Lubrication and ball bearings both reduce friction.
FRICTION
they are both forces
yes because you can warm your hands by friction when it is cold, but friction can stop you when you are trying to go down a slide.
there are 2 types: 1)static friction and 2)kinetic friction
On a car, friction is useful on the tyres and brakes. It is not required for the parts that rotate.
friction is actually both it just depends on what 2 things are rubbing together.
Both.
They are forces of nature.