Lots of friction in the world, some useful, some harmful. But friction is not something that merely exists or does not. It can be measured, and a thing can be said to have too little, too much, or a...
Friction is important for all sports.
Without it it becomes really hard to accelerate or deaccelerate.
For example a 100m sprinter.
It would be great for him if there wasnt any air resistance...
When you want travel at a constant speed for example. If an object was at a constant speed and you wanted it to stay at that speed without a resultant force, there would have to be no friction (and...