# What is acceleration?

• (noun): (physics) a rate of change of velocity.

## Acceleration

In physics, acceleration is the rate at which the velocity of a body changes with time. In general, velocity and acceleration are vector quantities, with magnitude and direction, though in many cases only magnitude is considered (sometimes with negative values for deceleration). Acceleration is accompanied by a force, as described by Newton's Second Law; the force, as a vector, is the product of the mass of the object being accelerated and the acceleration (vector). The SI unit of acceleration is the meter per second squared (m/s2).

### Some articles on acceleration:

Acceleration - Conversions
... Conversions between common units of acceleration m/s2 ft/s2 Standard gravity (g0) Gal (cm/s2) 1 m/s2 = 1 3.28084 0.101972 1 ... ft/s2 = 0.304800 1 0.0310810 30.4800 1 g0 = 9.80665 32.1740 ...
Curve Resistance - Inaccurate Formulas - Formulas Which Try To Account For Superelevation
... is directly proportional to (1.5 times) the absolute value of the unbalanced acceleration in the plane of the track and perpendicular to the rail, such lateral acceleration being equal to the centrifugal acceleration ... Multiplying any of these accelerations by the appropriate mass (in kg) (of the rail car, of the mass allocated to one wheel, etc.) results in the corresponding force per ...
Laboratory Centrifuge - Theory
... Protocols for centrifugation typically specify the amount of acceleration to be applied to the sample, rather than specifying a rotational speed such as revolutions per minute ... The acceleration is often quoted in multiples of g, the acceleration due to gravity at the Earth's surface ... running at the same rotational speed will subject samples to different accelerations ...
Linear Motion - Acceleration
... Acceleration is defined as the rate of change of velocity with respect to time ... Acceleration is the second derivative of displacement i.e ... acceleration can be found by differentiating position with respect to time twice or differentiating velocity with respect to time once ...
Spatial Acceleration
... In physics the study of rigid body motion provides for several ways of defining the acceleration state of a rigid body ... The classical definition of acceleration entails following a single particle/point along the rigid body and observing its changes of velocity ... In this article the notion of spatial acceleration is explored, which entails looking at a fixed (unmoving) point in space and observing the changes of velocity of ...

### More definitions of "acceleration":

• (noun): An increase in speed.
Example: "Modern science caused an acceleration of cultural change"
• (noun): The act of accelerating; increasing the speed.
Synonyms: quickening, speedup