The coefficient of static friction, typically denoted as " ? " s, is usually higher than the coefficient of kinetic friction.
12.
I'll see if I can find simple equations to determine " mu-k " ( kinetic friction coefficient ) from the slow-down time.
13.
The force of friction is always exerted in a direction that opposes movement ( for kinetic friction ) or potential movement ( for static friction ) between the two surfaces.
14.
The friction force F exerted between the moving surfaces is equal to a value that is proportional to the product of the normal force N and the coefficient of kinetic friction ? k
15.
If an applied force is large enough to overcome the static friction, then the reduction of the friction to the kinetic friction can cause a sudden jump in the velocity of the movement.
16.
A coefficient of kinetic friction of 0.7 are standard for the purpose of determining a bare baseline for accident reconstruction and judicial notice; most people can stop slightly sooner under ideal conditions.
17.
This would be similar to, say, the inertia of an object between static friction versus kinetic friction, a metastable state, or the large latent heat energy required during a phase change.
18.
Assuming you mean kinetic friction as it applies to railway transport ( see friction ), take a look at our articles on rolling resistance and feed me 09 : 42, 8 October 2007 ( UTC)
19.
Where a p is the acceleration the pulley experiences, a is the acceleration the 10 kg mass experiences, and F f is the force of kinetic friction which I calculate to be 39.2N.
20.
It looks like the question isn't making any distinction between static and kinetic friction, so assume you should just treat the friction as kinetic .-- mattb @ 2007-01-25T03 : 19Z
