Word Finder - acceleration

definition

The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

example

a falling body moves toward the earth with an acceleration of velocity

definition

The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).

example

The boosters produce an acceleration of 20 metres per second per second.

definition

The change of velocity with respect to time (can include deceleration or changing direction).

definition

The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.

The acceleration therefore remains the same, and the velocity is unaltered.

The pull recorded on the diagram includes the resistances due to acceleration and to the gradient on which the train is moving.

Since the difference between the acceleration of gravity at the pole and at the equator is about 2%, the correction for latitude will be quite sensible in an instrument which might be used at various times in high and low latitudes.

This gives the acceleration of m as modified by the inertia of the wheel.

The rapid variation of certain groups of animals or the acceleration of certain organs is also not evidence of the sudden appearance of new adaptive characters.

The acceleration of a falling body is naturally attributed to the presence of the earth; and, though the body approaches the earth in the course of its fall, it is easily recognized that the conditions under which it moves are only very slightly affected by this approach.

He attained correct views as to the character of centrifugal force in connexion with Galileo's theory; and, when the fact of the variation of gravity (Galileo's acceleration) in different latitudes first became known from the results of pendulum experiments, he at once perceived the possibility of connecting such a variation with the fact of the earth's diurnal rotation relatively to the stars.

The total acceleration of any particle is that obtained by the superposition of the component accelerations derived from its association with the other particles of the system severally in accordance with this law.

A force is said to act upon each of two particles forming a pair, its magnitude being the product of mass and component acceleration of the particle on which it acts, and its direction that of this component acceleration.

As a law of acceleration of the planets relatively to the sun, its approximate agreement with Kepler's third law of planetary motion follows readily from a consideration of the character of the acceleration of a point moving uniformly in a circle.

In the case of a constant force, the acceleration or x is, according to (1), constant, and we have say, the general solution of which is x=1/8ati+At+B.

This acceleration is denoted by g; its value at Greenwich is about 981 centimetre-second units, or 322 feet per second.

If the inclination of the string to the vertical does not exceed a few degrees, the vertical displacement of the particle is of the second order, so that the vertical acceleration may be neglected, and the tension of the string may be equated to the gravity mg of the particle.

The unit of acceleration is the acceleration of a point which gains unit velocity in unit time; it is accordingly denoted by LT2.

Another important example is that of a particle subject to an acceleration which is directed always towards a fixed point 0 and is proportional to the distance from 0.

The locus of the point V is called the hodograp/z (q.v.); and it appears that the velocity of the point V along the hodograph represents in magnitude and in directon tbt acceleration in the original orbit.

The acceleration of the centre is therefore the same as if the plane were smooth and the mass of the sphere were increased by C/a.

Thus the centre of a sphere rolling under gravity on a plane of inclination a describes a parabola with an acceleration g sin a/(I+C/Ma)

Neglecting the vertical acceleration we have P=gpx, whence a f ay\

Acceleration Image.Although it is possible to obtain the acceleration of points in a kinematic chain with one link fixed by methods which utilize the instantaneous centres of the chain, the vector method more readily lends itself to this purpose.

It should be understood that the instantaneous centre considered in the preceding paragraphs is available only for estimating relative velocities; it cannot be used in a similar manner for questions regarding acceleration.

That is to say, although the instantaneous centre is a centre of no velocity for the instant, it is not a centre of no acceleration, and in fact the centre of no acceleration is in general a quite different point.

In applying this principle to the drawing of an acceleration diagram for a mechanism, the velocity diagram of the mechanism must be first drawn in order to afford the means of calculating the several radial accelerations of the links.

Then assuming that the acceleration of one point of a particuar link of the mechanism is known together with the corresponding configuration of the mechanism, the two Vectors Ac and ct can be drawn.

Examples, completely worked out, of velocity and acceleration diagrams for the slider crank chain, the four-bar chain, and the mechanism of the Joy valve gear will be found in ch.

When a weight is reciprocated, the equal and opposite force required for its acceleration at any instant appears as an unbalanced force on the frame of the machine to which the weight belongs.

In balancing the mechanism of a steam engine it is often sufficiently accurate to consider the motion of the pistons as simple harmonic, and the effect on the framework of the acceleration of the connecting rod may be approximately allowed for by distributing the weight of the rod between the crank pin and the piston inversely as the centre of gravity of the rod divides the distance between the centre of the cross head pin and the centre of the crank pin.

A more accurate though still approximate expression for the force on the frame due to the acceleration of the piston whose weight is W is given by w2r cos 0 + r cos 20

An excess of the effort exerted on any piece, above that which is necessary to balanoe the resistance, is accompanied with acceleration; a deficiency of the effort, with retardation.

When a machine undergoes alternate acceleration and retardation, so that at certain instants of time, occurring at the end of intervals called periods or cycles, it returns to its original speed, then in each of those periods or cycles the alternate excesses of energy and of work neutralize each other; and at the end of each cycle the principle of the equality of energy and work stated in 87, with all, its consequences, is verified exactly as in the case of machines of uniform speed.

At intermediate instants, however, other principles have also to be taken into account, which are deduced from the second law of motion, as applied to direct deviation, or acceleration and retardation.

The rate of acceleration will be dv/dt = const.

Let e denote the quantity by which the energy exerted in each cycle of the working of the machine alternately exceeds and falls short of the work performed, and which has consequently to be alternately stored by acceleration and restored by retardation of the flywheel.

For a given link, this force isthe resultant of all the accelerating forces distributed through the substance of the material of the link required to produce the requisite acceleration of each particle, and the determination of this force depends upon the principles of the two preceding sections.

When the link forms part of a mechanism the respective accelerations of two points in the link can be determined by means of the velocity and acceleration diagrams described in 82, it being understood that the motion of one link in the mechanism is prescribed, for instance, in the steam-engines mechanism that the crank shall revolve uniformly.

Let the acceleration of the two points B and K therefore be supposed known.

Og is then the acceleration of the centre of gravity and the force F can therefore be immediately calculated.

Skids are caused by harsh handling of the vehicle; harsh braking, acceleration or steering.

The only way you can actually calculate the acceleration of the trolley is by using a ticker timer.

As an example, consider the equation for the velocity v of an object that undergoes an acceleration a for a time t.

For 3D acceleration, Tempest supports up to 1152 x 870 @ 16-bit color or 832 x 624 @ 24-bit color.

Citroen says that this gives it a 0-60mph acceleration time of just over six seconds and a top speed in excess of 155mph.

And out on the highway, this 7% increase in drive force makes for outstandingly strong roll-on acceleration.

Enhanced waves in these regions could play a major role in electron acceleration to relativistic energies during periods of prolonged substorm activity.

At the rear is a limited slip differential with a 3.46 to 1 ratio to reduce rear wheel slip under acceleration.

Fall, and then comment on the acceleration due to gravity... Worm Theory Why do endgames take so long?

Now, if m represent the mass of the body in grammes its weight will be mg dynes, for it will require a force of mg dynes to produce in it the acceleration denoted by g.

The acceleration, a, which may be supposed uniform, is 1.465.

The average acceleration in feet per second is measured by the fraction Change of speed in feet per sec. 60.07-58.6 64 tons; and to obtain the horse-power the boiler will be one of the largest that can be built to the construction gauge.

In this expression it is assumed that the acceleration is uniform, and this assumption is sufficiently accurate for any practical purpose to which the above formula would be applieu in the ordinary working of a locomotive.