Αποτελέσματα Αναζήτησης
Air friction, or air drag, is an example of fluid friction. Unlike the standard model of surface friction, such friction forces are velocity dependent. The velocity dependence may be very complicated, and only special cases can be treated analytically.
If two systems are in contact and stationary relative to one another, then the friction between them is called static friction. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction.
21 Νοε 2022 · The further away from the car you get, the higher the wind speed. A certain distance from the car, the air will be traveling at its full speed of 200km/h. The region surrounding the car where the air speed increases from zero to its maximum is known as the boundary layer.
Friction is a force that opposes relative motion between systems in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between systems and always in a direction that opposes motion or attempted motion of the systems relative to each other.
The friction between the tires of your automobile and the road determine your maximum acceleration, and more importantly your minimum stopping distance. So the nature of that friction could actually be a matter of life and death.
Equations Introduced and Used for this Topic: a = Δv t. →a = Δ→v t. Δv = vf −vi. v = (v1 +vf) 2. vf =vi +at. 2ad = vf2−vi2. d = vit + 1 2at2. d = (vi +vf)t 2. F f = μN or μmg (simplest case on horizontal surface) Ff = μN where N = mg cos ø F f = μ N where N = m g cos ø. (on an inclined surface) Ffs = μsN F f s = μ s N. Ffk = µkN F f k = µ k N.
Friction caused by air is called air resistance or drag. Bikes, cars and other moving objects experience air resistance as they move through the air.
