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).

For example, an object such as a car that starts from standstill, then travels in a straight line at increasing speed, is accelerating in the direction of travel. If the car changes direction at constant speedometer reading, there is strictly speaking an acceleration although it is often not so described; passengers in the car will experience a force pushing them back into their seats in linear acceleration, and a sideways force on changing direction. If the speed of the car decreases, it is usual and meaningful to speak of deceleration; mathematically it is acceleration in the opposite direction to that of motion.

Read more about Acceleration:  Definition and Properties, Tangential and Centripetal Acceleration, Conversions

Other articles related to "acceleration, 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 ...
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 ... rotational speed will subject samples to different accelerations ...
Spatial Acceleration
... 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 whatever ...
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 1 ...
Curve Resistance - Inaccurate Formulas - Formulas Which Try To Account For Superelevation
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