People with cerebellar ataxia may have trouble regulating the force, range, direction, velocity and rhythm of muscle contractions.

These variations included barrel wear, propellant temperature, different projectiles weights that all affected the muzzle velocity, and air temperature, density, wind speed & direction and rotation of the earth that affect the shell in flight.

In the case of an observer on Earth, the direction of a star's velocity varies during the year as Earth revolves around the Sun ( or strictly speaking, the barycenter of the solar system ), and this in turn causes the apparent position of the star to vary.

Another way to state this is that the emitting object may have a transverse velocity with respect to the observer, but any light beam emitted from it which reaches the observer, cannot, for it must have been previously emitted in such a direction that its transverse component has been " corrected " for.

Centripetal force ( from Latin centrum " center " and petere " to seek ") is a force that makes a body follow a curved path: its direction is always orthogonal to the velocity of the body, toward the fixed point of the instantaneous center of curvature of the path.

The Coriolis force acts in a direction perpendicular to the rotation axis and to the velocity of the body in the rotating frame and is proportional to the object's speed in the rotating frame.

The rate of diffusion of A, N < sub > A </ sub >, depend on concentration gradient and the average velocity with which the molecules of A moves in the x direction.

Beware that, in the common and important case of metallic wires, the direction of the conventional current is opposite to the drift velocity of the actual charge carriers, i. e., the electrons.

The velocity is maximum for zero displacement, while the acceleration is in the opposite direction as the displacement.

The difference is that electrons in the upper bound of the valence band have opposite group velocity and wave vector direction when moving, which can be effectively treated as if positively charged particles ( holes ) moved in the opposite direction to that of the electrons.

where the angular rotation of the frame is expressed by the vector Ω pointing in the direction of the axis of rotation, and with magnitude equal to the angular rate of rotation Ω, symbol × denotes the vector cross product, vector x < sub > B </ sub > locates the body and vector v < sub > B </ sub > is the velocity of the body according to a rotating observer ( different from the velocity seen by the inertial observer ).

Unlike the physics of rigid bodies where the equations of motion describe the physical location of the rigid body, fluid dynamics describes the flow as a velocity field, i. e. a solution associates each point in space with a vector that represents the speed and direction of the flow at that point.

Terminal velocity is achieved when the drag force is equal in magnitude but opposite in direction to the force propelling the object.

For a boost in an arbitrary direction with velocity v, it is convenient to decompose the spatial vector r into components perpendicular and parallel to v:

However, the most important experiment supporting Fresnel's theory, was Fizeau's 1851 experimental confirmation of Fresnel's 1818 prediction that a medium with refractive index n moving with a velocity v would increase the speed of light traveling through the medium in the same direction as v from c / n to:

One tool for determining the direction of the velocity vector of a moving charge, the magnetic field, and the force exerted is labeling the index finger " V ", the middle finger " B ", and the thumb " F " with your right hand.

Like velocity, linear momentum is a vector quantity, possessing a direction as well as a magnitude:

In a coordinate system with axes, velocity has components in the direction, in the direction, in the direction.

Consider, for example, a reference frame moving relative to another at velocity in the direction.

Section dm < sub > 1 </ sub >, therefore, has a lot of angular rotating velocity with respect to the rotation around the pivot axis, and as dm < sub > 1 </ sub > is forced closer to the pivot axis of the rotation ( by the wheel spinning further ), due to the Coriolis effect dm < sub > 1 </ sub > tends to move in the direction of the top-left arrow in the diagram ( shown at 45 °) in the direction of rotation around the pivot axis.

It is also representative of the evolution and direction of our team .” During the 2003 preseason Michael Vick broke his leg and missed the first twelve games of the season.

In the rainy season the Save is a large stream and even in the " dries " it can be navigated from its mouth by shallow draught steamers for over 150 m. Its general direction through Portuguese territory is east by north.

The early part of Coughlin's tenure produced inconsistent results ( a 25 – 23 record and two playoff appearances — both losses, before the 2007 season ) and spawned intense media scrutiny concerning the direction of the team.

At the time the two of us were in Heliopolis and we both witnessed the extraordinary phenomenon of the moon hiding the sun at the time that was out of season for their coming together ... We saw the moon begin to hide the sun from the east, travel across to the other side of the sun, and return on its path so that the hiding and the restoration of the light did not take place in the same direction but rather in diametrically opposite directions ..."

2001 saw some much needed optimism for the team as Ferrari agreed to be the team's engine supplier for the season, the team now moving in the right direction.

This region is notorious for a hot, humid climate in which tropical fevers are endemic and also for the destructive cyclones that occur during the rainy season, coming in principally from the direction of the Mascarene Islands.

Being near the centre of Middle-earth, the winds and air masses can come from almost any direction and the weather is highly variable in any season.

Playing their home games at Cleveland Arena under the direction of head coach Bill Fitch, they compiled a league-worst 15 – 67 record in their inaugural season.

Following the drafting of the talented center Andre Drummond, the new direction of rebuilding with young draft picks was never more obvious, with five rookies on the roster set for the 2012-13 NBA season.

At any given point on the Earth's surface, the magnitude and direction of the wind would vary with time of day and season.

Other associations include north as the cardinal direction, winter season and the number six.

The season associated with him is winter ( snow ), direction is north-east and element is ether or space.

His element is water, direction is north-west and season is winter.

* October 16 – The New York Philharmonic-Symphony Orchestra announces that, at the request of their music director, Dimitri Mitropoulos, they have engaged Leonard Bernstein to share the direction of the orchestra with Mitropoulos for the 1957 – 58 season.

Tracy Tormé, the original forerunner of the show, quit after this season, citing conflict with the Fox network on the show's direction.

The series co-creator, Tracy Tormé, has often been critical of the direction the series took in the third season.

Under his direction, in the 2009-2010 season, the National Theatre expanded its audience by beginning simulcast of live productions, to movie theater venues in the United Kingdom and abroad, through its programme National Theatre Live ( NTLive ).

Olivier's performance won him an engagement as the leading man of the Old Vic Theatre the following season, starting his career as a classical actor, but he was said to have resented Gielgud's direction and developed a wary relationship with Gielgud which resulted in Olivier turning down Gielgud's request to play the Chorus in Olivier's film of Henry V and later doing his best to block Gielgud from appearing at the Royal National Theatre when Olivier was its director.

RGP Productions produced the play in Sydney, followed by a season at the Australian War Memorial in Canberra in 2007, starring Roger Gimblett as Sassoon and Patrick Magee as Owen, with direction by Carla Moore.

Under Smith's direction, the Rapids surged back into the playoff race, including two key away wins, only to fall short of the playoffs in the last game of the season, against rivals Real Salt Lake.

Nonetheless, it was a step in the right direction as the Roughriders learned how to win and gained valuable playoff experience that they would need during the following season.

* John Gielgud played Charles Surface in a legendary season at the Queens Theatre in 1937 and repeated the role under his own direction in a 1963 Broadway production.

Sir Henry Irving ( 6 February 1838 – 13 October 1905 ), born John Henry Brodribb, was an English stage actor in the Victorian era, known as an actor-manager because he took complete responsibility ( supervision of sets, lighting, direction, casting, as well as playing the leading roles ) for season after season at the Lyceum Theatre, establishing himself and his company as representative of English classical theatre.