When you are walking, when you are trying to stop your car, and lighting a match.
Very simply, desirable friction can be found on cars. Brakes are a good example. Another one is when you rub your hands together to produce heat. Striking a match is another and also uses a chemical reaction to produce a flame. All friction produces heat and many hundreds of uses have been found to utilise this heat.
Antaganism
a car wheel on the road
air friction also called air resistance or drag solid friction which is just normal friction and liquid friction like hydro-dynamics
ction
the brakes of you car are helped by friction.
Desirable in scrummaging when the two packs form together. Without friction they would slip off which is dangerous. Friction is also desirable when making the tackle. And when sidestepping you need good grip. Undesireable when trying to evade the tackle.
Friction is desirable on your tyres and brakes. Tyres need to grip the road, to push the car forward, stop and go round corners. Brakes need friction to stop the wheels turning.
friction
Very simply, desirable friction can be found on cars. Brakes are a good example. Another one is when you rub your hands together to produce heat. Striking a match is another and also uses a chemical reaction to produce a flame. All friction produces heat and many hundreds of uses have been found to utilise this heat.
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Examples of SLIDING FRICTION is pushing a heavy rock in your path, or moving a box on the floor.
The fact that you can walk without sliding is an example of friction.
Some examples of relatively high friction surfaces are: sand paper, grass, and asphalt. In general, the rougher the surface, the more friction it has.
Antaganism
friction
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