Acceleration is the time rate of change of velocity and/or direction, and at any point on a velocity-time graph, it is given by the slope of the tangent to the curve at that point. In physics, **acceleration** is defined as the rate of change of velocity, or, equivalently, as the second derivative of position. It is thus a vector quantity with dimension length/time². In SI units, acceleration is measured in meters/second² (m·s^{-}²). The term "acceleration" generally refers to the change in instantaneous velocity. Image File history File links No higher resolution available. ...
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A magnet levitating above a high-temperature superconductor demonstrates the Meissner effect. ...
For a non-technical overview of the subject, see Calculus. ...
This article is about velocity in physics. ...
This article is about vectors that have a particular relation to the spatial coordinates. ...
For other uses of this word, see Length (disambiguation). ...
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The metre (or meter) per second squared is the SI derived unit of acceleration. ...
## Relation to relativity
After completing his theory of special relativity, Albert Einstein realized that forces felt by objects undergoing constant proper acceleration are indistinguishable from those in a gravitational field. This was the basis for his development of general relativity, a relativistic theory of gravity. For a less technical and generally accessible introduction to the topic, see Introduction to special relativity. ...
â€œEinsteinâ€ redirects here. ...
In special relativity, four-acceleration is a four-vector and is defined as the change in four-velocity over the particles proper time: where and and is the Lorentz factor for the speed . ...
For a less technical and generally accessible introduction to the topic, see Introduction to general relativity. ...
Gravity is a force of attraction that acts between bodies that have mass. ...
This is also the basis for the popular Twin paradox, which asks why one twin ages more rapidly when moving away from his sibling at near light-speed and then returning, since the aging twin can say that it is the other twin that was moving. General relativity solved the "why does only one object feel accelerated?" problem which had plagued philosophers and scientists since Newton's time (and caused Newton to endorse absolute space). In *special* relativity, only inertial frames of reference (non-accelerated frames) can be used and are equivalent; *general* relativity considers *all* frames, even accelerated ones, to be equivalent. (The path from these considerations to the full theory of general relativity is traced in the Introduction to general relativity.) In his famous work on Special Relativity in 1905, Albert Einstein predicted that when two clocks were brought together and synchronised, and then one was moved away and brought back, the clock which had undergone the traveling would be found to be lagging behind the clock which had stayed put. ...
For a less technical and generally accessible introduction to the topic, see Introduction to general relativity. ...
An inertial frame of reference, or inertial reference frame, is one in which Newtons first and second laws of motion are valid. ...
Newtonâ€™s conception and quantification of gravitation held until the beginning of the 20th century, when Albert Einstein extended the special relativity to form the general relativity (GR) theory. ...
## Formula The **formula** for acceleration is (Final Velocity - Initial Velocity / Total Time Taken)
## References - Serway, Raymond A.; Jewett, John W. (2004).
*Physics for Scientists and Engineers*, 6th ed., Brooks/Cole. ISBN 0-534-40842-7. - Tipler, Paul (2004).
*Physics for Scientists and Engineers: Mechanics, Oscillations and Waves, Thermodynamics*, 5th ed., W. H. Freeman. ISBN 0-7167-0809-4. ## External links Kinematics Kinematics (Greek ÎºÎ¹Î½ÎµÎ¹Î½,kinein, to move) is a branch of mechanics which describes the motion of objects without the consideration of the masses or forces that bring about the motion. ...
| ← Integrate ... Differentiate → Displacement (Distance) | Velocity (Speed) | **Acceleration** | Jerk | Snap This article is about the concept of integrals in calculus. ...
For a non-technical overview of the subject, see Calculus. ...
In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. ...
Distance is a numerical description of how far apart objects are at any given moment in time. ...
This article is about velocity in physics. ...
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Look up jerk, jolt, surge, lurch in Wiktionary, the free dictionary. ...
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