Friction can be very helpful. It prevents things from slipping away from your hand easily. Stopping a car from crashing (breaks). Slows you down when necessary
Makes us able to stand up. Helps us sand things when doing wood projects (with sandpaper). Makes us able to carry things. You can also warm your body by friction by rubbing your hands together or on certain body parts to warm yourself up.
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A common example of useful friction is the friction between the tires of a car and the road surface. This friction provides the necessary traction for the vehicle to accelerate, decelerate, and turn safely. Without this friction, the car would not be able to move or maneuver effectively.
Brake pads and brake shoes used on cars, motorcycles, trucks, trains, aircraft and many other types of machinery. Sandpapers and polishes. A Van de Graaff Generator uses friction to produce high voltage static electricity.
Brake pads and brake shoes used on cars, motorcycles, trucks, trains, aircraft and many other types of machinery. Sandpapers and polishes. A Van de Graaff Generator uses friction to produce high voltage static electricity.
rubbing 2 sticks to make fire!
sprinkling sand on an icy road
wearing batting glovessprinkling sand on an icy roadapplying the brakes on a car
writing on paper with a pen.
hi there! not sure what you mean by "useful friction" but I'm guessing that you're asking "what examples are there where friction is useful" A simple example is that of sandpaper. Where you need to smoothen something and using a smooth (ie frictionless sandpaper) would be useless. A more day to day example would include the friction between your shoes and the ground without which you would be unable to walk with (like skating on ice). In fact, friction is required for you to grab anything (even a book which would slip off your fingers without friction). As for an explicit use of friction there's "Friction Welding" where mechanical friction is used to weld metal together. An article may be found on our friend Wikipedia. http://en.wikipedia.org/wiki/Friction_welding How this helps anybody reading! Cheers!
There are many examples. Friction for example prevents our shoes slipping on the pavement when we walk. It is used in vehicle's brakes. Materials like rubber are used i many ways for increasing friction - in tires, different handles for easier grip, bike brakes and so on. Friction i s also used in machines for grinding cutting and polishing.
Friction between your shoes and the ground stops you slipping and/or falling over.
An example of not useful friction is the friction between the tires of a car and the road surface when trying to accelerate. This friction wastes energy in the form of heat and wears down both the tires and the road, without serving a beneficial purpose in this context.
An example of a non-useful friction is air resistance when riding a bicycle. It can slow down the motion of the bicycle and requires more energy to overcome, making it less efficient.
Sandpaper is high in friction but is not considered useful in terms of being helpful in a general sense.
stopping cars Friction is useful to start a fire with sticks.
Static friction is useful when trying to prevent slipping or sliding of objects on a surface. For example, static friction allows car tires to grip the road, enabling the vehicle to accelerate and stop effectively. This type of friction is crucial for stability and control in various everyday activities.