Friction is a both a boon and a bane”. Write an article ( around 100 words) on this topic .
Answers
Friction is both the boon and the bane of our everyday lives. It’s the force that drags against your car’s tires, making you use more gas to keep going. It’s also the force that allows your car to stop at all: Without friction, brakes would be dead weight. Although most of us take friction for granted when we hit the stop pedal, many of its details are still a mystery.
A recent study helped broaden our understanding by probing the dynamics of friction an atom at a time. Using a technique called atomic force microscopy, scientists measured how the orientation of single atoms plays a crucial role in determining the strength of frictional forces between two materials. “We know that friction has a directional dependence it’s easier to pet a cat in one direction than another,” says Jay Weymouth at the University of Regensburg in Germany. “But we were able to measure clearly the directional dependence at the atomic level, and fully describe it. "
Friction is the force working against the sliding of one object against another, and generally increases with the force pushing the surfaces together. Even seemingly smooth surfaces, such as a wooden table, are really jagged and rough on a microscopic scale, and all these tiny outcroppings on one surface drag and catch the grooves on any other being slid across it. Atomic bonds break and form and break again. And this movement sets the atoms oscillating, which, in turn, generates heat. All of this costs the system energy, which results in the motion between the surfaces slowing. When you walk along a sidewalk, molecules in the rubber soles catch on the molecules in the cement, resisting your motion. Without this resistance, you wouldn’t be able to walk at all your shoes would slide backward with every step you took, as if you were imitating Michael Jackson’s Moon Walk. Lol
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