Search results
Results From The WOW.Com Content Network
To keep a box moving across the floor at a constant velocity I need to apply a force equal and opposite to that of the kinetic friction force working on it. If I start applying a force greater than the kinetic friction force, the box will speed up. Will it keep speeding up indefinitely, or will the kinetic friction force I need to overcome ...
The first obvious reason is that if the object is moving, then kinetic friction comes into play, or else rolling friction comes into play in real rolling conditions. Only in a perfectly ideal pure rolling scenario can we take static friction in our calculations. However most of the questions deal with ideal cases so this part is mostly correct.
Understanding the relationship between the drag, which is the force of friction in the context of fluids, and the speed of relative motion is simpler than understanding the relationship in the context of friction between the surfaces of everyday solid objects. The law of static friction referred to in the question is at best a semi-empirical ...
Kinetic friction is the force experienced when you drag an object on the floor. Static friction is what enables you to hold objects without it slipping away from your fingers. Similarly, as you drive, assuming that the wheels don't spin, your wheels are pushing backwards against the floor, and friction is the opposing force that pushes your ...
Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Kinetic friction is all about trying to stop one surface from skidding against another surface. When you have two things such as the wheel and the ground sliding against each other, this is kinetic friction. However, when the wheels are rotating, there is static friction between the ground and the wheel.
The angle of friction is related to the coefficient of static friction, not kinetic friction. Wikipedia defines it as "the maximum angle at which a load can rest motionless on an inclined plane due to friction without sliding down". Clearly the reference to "motionless" means the friction force is static, not kinetic.
The friction force times the velocity tells you the energy lost to heat per unit time, the work done by friction. This work is the constant friction force times the velocity. This means that friction will remove an equal increment of energy in equal distance.
There are two reasons for friction: Interlocking; Bonds or cold welding; When an object is at rest it makes bonds with the surface and the irregularities on the surface of both of the objects get interlocked due to which the friction at that time is called static friction and has the highest friction force.
kinetic friction, which tries to stop an ongoing sliding. These two are never acting simultaneously. Static is there before sliding starts (think of a parked car on a sloped San Francisco road, or think of you pushing a table that just won't move), and kinetic after sliding has started (think of a curling stone thrown across the ice, or think ...