on pseudo-scientific forums with amazing frequency ignite serious debate about what is the Coriolis force, and what are its visible manifestations.Despite its venerable age discoveries - the phenomenon has been described as early as 1833 - some people are sometimes confused in the conclusions.For example, since most of the Coriolis force associated with the phenomena in the oceans and atmosphere, on the internet you can find the claim that the undermining of the river banks of the northern hemisphere occurs on the right side, and in the Southern scouring action of water is mainly on the left bank.Some argue that this phenomenon creates a Coriolis force.Their opponents explain everything else: the rotation of the planet's solid surface moves a little faster (less inertia) than the mass of water and because of this difference is a substitution.Although some of the processes taking place in the ocean, really, "guilty" of the Coriolis force.The difficulty in determining it from a range of other effects.Coriolis manifestation, as the force of the gravitational interaction potential.
Let's define what kind of power, and why is such an interest.Since our planet can be considered a non-inertial systems (moving and rotating), then any process, reporting on its must take into account inertia.Typically, this is used to illustrate the special pendulum length of over 50 meters and weighing tens of kilograms.Moreover, the relatively stationary observer standing on the floor plane in which the pendulum swings rotates circumferentially.If the speed of rotation of the planet would be higher than the oscillation period of the pendulum, its notional plane is shifted toward the Northern Hemisphere rotates backwards relative to the clock, direction.Conversely, increasing the period is higher than the speed of rotation of the Earth, will lead to a shift in the direction of the clock hands.This occurs due to the fact that the rotation of the planets in the system creates a rotational acceleration of the pendulum, a vector which shifts the rolling plane.
To explain, we can use an example from the life.Surely, each as a child riding on the carousel, which is a rotating with a certain angular velocity of a large disk.Imagine two points on the disc, one near the central axis (A) and the second - on the near edge to the radius (B).If a person who is at point A, decides to move to point B, then, at first glance, the optimal trajectory is a straight line AB, in fact, is the radius of the disk.But with every step of human point B is displaced as the disc is spinning.As a result, if we continue to move along the planned line-radius when the radius of the point B, it was no longer would be due to bias.If a person will adjust his way in accordance with the actual position B, then the trajectory will present a curved line, a wave, the top of which is directed against the direction of rotation.However, there is a way to get from A to B in a straight line: it is necessary to increase the speed of movement to the body (human) acceleration.With increasing distance AB to preserve rectilinear motion all necessary impetus to a growing rate.The difference is described by the centrifugal force that the latter coincides with the direction of radius on the rotating circumference.
So, moving on a rotating object has an effect Coriolis force.The formula it follows:
F = 2 * v * m * cosFi,
where m - mass of the moving body;v - speed of movement;cosFi - the quantity, taking into account the angle between the direction of motion and the axis of rotation.
Or in the vector representation:
F = - m * a,
where a - the Coriolis acceleration.The sign "-" occur because the force from the moving body the opposite direction.
