things with wheels such as glass, bowls and other circular objects
Rubber will have a high coefficient of friction on most surfaces, but we cannot know whether there is more or less friction unless we have something to compare it to.
without friction most things become impossible.
1) friction thats lows things down is called dynamic friction 2) friction that stops things is called static friction 3) most of friction makes heat ( rubbing hands together )
Friction and Air Resistance
Static friction has the most resistance, as it occurs when two surfaces are not moving relative to each other. Kinetic friction has less resistance, as it occurs when two surfaces are sliding against each other. Rolling friction has even less resistance, as it occurs when a round object rolls over a surface.
It need not be less than one; it just happens to be so in most cases.
Rough asphalt roads typically have the most friction due to the texture of the surface, which provides better traction for vehicles. Smooth roads, such as concrete or tarmac, may have less friction and can be more slippery, especially when wet.
Your mom has the most friction. (:
Surfaces which are rough create the most friction. Like cement, or sand paper.
You would want to maximize area of contact, and for air friction you would want to maximise the area facing the wind, or direction of motion, Either way the most friction is had from a sheet, provided it can be kept in the right orientation.
A rough and uneven streambed would cause the most friction. Large rocks, boulders, or other obstacles in the streambed create turbulence and resistance to the flow of water, increasing friction. Smooth and flat streambeds, on the other hand, have less friction as water can flow more freely over them.
Polish would most likely smooth the surface creating less friction and making it more slippery.