examples of advantages of friction in daily life

Friction - The instant sliding occurs, static friction is no longer applicable and kinetic friction becomes applicable. An example of static friction is the force that prevents a car wheel .....

Friction - Static friction is friction between two solid objects that are not moving relative to each other. For example, static friction can prevent an object from sliding down a sloped .....

Friction - The skin friction of air on an airplane or of water on a swimmer are two examples of fluid friction. This kind of friction is not only due to rubbing, .....

Friction - The skin friction of air on an airplane or of water on a swimmer are two examples of fluid friction. This kind of friction is not only due to rubbing, which generates a force .....

Eyes Evolved For 'X-Ray Vision': Forward-facing Eyes Allow Animals To .. - ScienceDaily (Aug. 29, 2008) — The advantage of using two eyes to see the world around us has long been associated solely with our capacity to see in 3-D. Now, a new study from a scientist at Rensselaer Polytechnic Institute has uncovered a truly eye-opening advantage to binocular vision: our ability to see through things. See also: Plants & Animals Nature Extreme Survival Animals Fossils & Ruins Early Humans Origin of Life Charles Darwin Reference Equilibrioception The evolution of human intelligence Pupil Evolution of the eye Most animals — fish, insects, reptiles, birds, rabbits, and horses, for example — exist in non-cluttered environments like fields or plains, and they have eyes located on either side of their head. These sideways-facing eyes allow an animal to see in front of and behind itself, an ability also known as panoramic vision. Humans and other large mammals — primates and large carnivores like tigers, for example — exist in cluttered environments like forests....

Predator Pressures Maintain Bees' Social Life - ScienceDaily (Jan. 5, 2008) — The complex organisation of some insect societies is thought to have developed to such a level that these animals can no longer survive on their own. New research suggests that rather than organisational, genetic, or biological complexity defining a 'point of no return' for social living, pressures of predation create advantages to not living alone. See also: Plants & Animals Insects (and Butterflies) Evolutionary Biology Mating and Breeding Agriculture and Food Animals Developmental Biology Reference Bee Africanized bee Wildlife gardening Beekeeping The ancient systems of sociality in bees, wasps, termites, and ants seem to have become an obligatory way of life for these organisms as there are almost no examples of species reverting to solitary lifestyles. 'This has prompted the notion of a 'point of no return' whereby evolutionary changes in behaviour, genetics, and shape in adaptation to a social lifestyle prohibit the insects from living without thei....

Engineers Create Gecko-inspired, High-friction Micro-fibers - ScienceDaily (Aug. 23, 2006) — Inspired by the remarkable hairs that allow geckos to hang single-toed from sheer walls and scamper along ceilings, a team of researchers led by engineers at the University of California, Berkeley, has created an array of synthetic micro-fibers that uses very high friction to support loads on smooth surfaces. See also: Plants & Animals Extreme Survival Soil Types Life Sciences Matter & Energy Materials Science Chemistry Inorganic Chemistry Reference Friction Motor neuron Gecko Tensile strength High friction materials can prevent sliding under high loads or steep inclines. The researchers found that the synthetic array of polypropylene fibers could hold a quarter to a glass slide inclined at an 80 degree angle, yet is not 'sticky' like adhesive tape. The fibers, packed 42 million per square centimeter, each measured a mere 20 microns long and 0.6 microns in diameter, or about 100 times thinner than a human hair. One micron is one-thousandth of a millimet....

  Eureka! Episode 13 - Mechanical Advantage and Friction   Professors A and B compare the mechanical advantage of an inclined plane with that of a lever.

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Question : just 1 example for each. :)

Answer : One object, three examples: Car tires on the street. Static friction: trying to push a parked car sideways. Rolling friction: the friction of the tires as the car drives along the street. It takes energy to overcome both wind resistance and rolling friction. Sliding friction: The driver of the car slams on the brakes and the car skids along the street. That is sliding friction.

Question : I have this activity for science about friction and I have to come up with real life examples of rolling friction, sliding friction and fluid friction. My teacher said that we have to get creative with the real life examples, (for exmaple, nothing like moving a desk/box for sliding, or nothing like a car that is moving for rolling). Anybody have some creative ideas? Thanks!(=

Answer : Rolling friction: Ripley is deep in the subterranean compound and hears an Alien ahead. She rolls a grenade down the hall. Calculate how far the grenade can go with a 2.5 second fuse. Sliding friction: After the blast goes off, she discovers that there are several Aliens and the grenade didn't kill them all. She runs back, making a desperate slide to get under a blast door before it closes. How far can she slide before friction brings her to a stop? Fluid friction: Following a titanic battle in the control room, Ripley sets the timer on a nuke and heads for the exit. With the surface exit sealed, her only escape is to take a miniature sub through a deep marine cave. If she redlines the engine to 20% over normal maximum speed, how far can she get before the bomb goes off? There you go - science friction. :)

Question : for example,in nuclear energy,biotechnology,agriculture and so on.what is the effect to our life

Answer : Advantages- general improvements to our life such as better foods, medicines, products, and health Disadvantages- negative effects on environment, increases the socioeconomic gap between the very poor and very rich,products can be exploited for bad use.