- #1
Skhandelwal
- 400
- 3
I don't get it, first of all, why does air friction quadruples as velocity doubles? Second, if that air friction works in that way, why does kinetic work in a constant manner?
The short answer is that it doesn't, exactly. The formula for kinetic friction is empirically derived and is only approximately true.Skhandelwal said:I don't get it, first of all, why does air friction quadruples as velocity doubles? Second, if that air friction works in that way, why does kinetic work in a constant manner?
Physics is based upon mathematics.Skhandelwal said:all of you are explaning it mathematically, I have problem understanding it conceptually.
Kinetic friction is constant because it is independent of the velocity of the object. This means that no matter how fast or slow an object is moving, the kinetic friction will remain the same.
The value of kinetic friction is affected by the type of surfaces in contact, the normal force between the surfaces, and the roughness of the surfaces. Other factors such as temperature and the presence of lubricants can also affect the value of kinetic friction.
Kinetic friction is the force that resists the motion of an object when it is already in motion, while static friction is the force that resists the motion of an object when it is at rest. Kinetic friction is generally weaker than static friction, and it remains constant while static friction increases as the force applied to the object increases.
In theory, kinetic friction can be zero if there is no force acting against the motion of the object. However, in real-life situations, there will always be some amount of kinetic friction present due to imperfections in the surfaces and other external factors.
The coefficient of kinetic friction is determined by dividing the force of kinetic friction by the normal force between the surfaces. This value is experimentally determined by measuring the force required to keep an object in motion at a constant velocity.