2007-02-04 21:52:09 · 7 answers · asked by bonjette 2 in Science & Mathematics ➔ Physics
as we increase normal force frictional force also increases.friction directly proportional to normal force.
2007-02-04 22:33:08 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Increasing the normal force is decreasing the frictional force.This relationship comes from the equation that coefficient of friction is directly proportional to its frictional force and inversely proportional to the normal force.The coefficient of static friction is the relationship between the surface of the body and the surface in contact when the object is at rest, and when the object is moving, coefficient of kinetic friction.
2007-02-13 00:36:08 · answer #2 · answered by only_ y 1 · 0⤊ 0⤋
Static friction occurs when the two objects are not moving relative to each other (like a book on a desk). The coefficient of static friction is typically denoted as μs. The initial force to get an object moving is often dominated by static friction. The static friction is in most cases higher than the kinetic friction. Rolling friction occurs when one object "rolls" on another (like a car's wheels on the ground). This is classified under static friction because the patch of the tire in contact with the ground, at any point while the tire spins, is stationary relative to the ground. The coefficient of rolling friction is typically denoted as μr.
Kinetic (or dynamic) friction occurs when two objects are moving relative to each other and rub together (like a sled on the ground). The coefficient of kinetic friction is typically denoted as μk, and is usually less than the coefficient of static friction
2007-02-05 05:59:14 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Coefficients of static & kinetic frictions are constants for two bodies.
On increasing the normal force force of friction increases,coeff. remain unchanged.
When bodies start to rub against each other ,kinetic friction occurs.
Before that,static friction.
2007-02-05 07:09:35 · answer #4 · answered by neeraj_agarwal_1990 1 · 1⤊ 0⤋
It does NOT affect the coefficients of friction! They are a function of the surfaces of the two materials in contact with each other.
2007-02-11 21:07:46 · answer #5 · answered by Dennis H 4 · 0⤊ 0⤋
till the motion starts, the co-eff of static friction increases with the normal force. (directly proportional) till the mation starts, after the body starts moving, the co-eff of kinetic friction decreases with the applied force. (decrease in friction is directly proportional to the applied force).
2007-02-05 06:01:59 · answer #6 · answered by manu 1 · 0⤊ 0⤋
No effect, they are constants for the surfaces in contact. A clue is the fact they are called co-efficients, that usually means a constant.
2007-02-10 01:29:17 · answer #7 · answered by Roger S 3 · 1⤊ 0⤋