Friction depends partly on the suavity of the contacting surfaces, a greater force being needed to move two surfaces past wholeness a nonher if they atomic number 18 restive than if they atomic number 18 peaceful. Although two objects might look smooth, microscopically, they’re genuinely rough and jagged. However, friction decreases with smoothness only to a definite degree. Friction actually increases between two extremely smooth surfaces be former of increased attractive electrostatic forces between their atoms. Friction does not depend on the amount of surface area that are in contact between the moving bodies or on the relative speed of the bodies. What it does depend on though, is the magnitude of the forces prop the two bodies together. When a body is moving over a horizontal surface, it presses down against the surface with a force advert to its weight. An increase in the weight of the body creates more resistance, so there is more friction.
Friction is not all bad. It has a distribute do with life as we know it on Earth.
Without friction, we wouldn’t be able to do a lot of the things that we need to do. So why do we need friction? It’s friction that enables us to walk, among other things. Friction is what keeps one foot planted on the ground as the other one steps forward. Otherwise, without friction, the shift in weight would cause us to slide around. Also most braking systems use friction as their main component. When you squeeze the brakes on a 10-speed bike, a small rubber brake is pressed against some(prenominal) sides of the bike tire. The friction of the brake pad against the wheel causes the revolution of the wheel to slow down to a stop.
There are two types of friction, â€Å"static friction†and â€Å"kinetic frictionâ€Â. Static...If you motive to get a full essay, order it on our website: Orderessay
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