Type the acceleration value you want to convert in the box, and then choose the unit. Click the "Convert" button and read the result in the other box. Use the "reset" button to clear the calculation.

Acceleration is a physical vector quantity, called more precisely (acceleration vector), used in kinematics to represent the modification affecting the speed of a movement as a function of time. The norm intensity of this vector is called simply (acceleration) without any other qualifier.

In everyday language, acceleration is opposed to deceleration and indicates the increase in the speed or frequency of evolution of some process, for example the acceleration of the heart rate or that of a sequence of situations.

The acceleration, which is usually denoted "a", of a body or for example of a vehicle, is equal to the difference between its initial speed v1 (the starting speed) and its arrival speed v2 in m / s (meter per second), the whole divided by the duration t of this acceleration in s (second).

Kilometer Per Hour Per Second (km/h-s) is a unit in the category of Acceleration. Kilometer Per Hour Per Second (km/h-s) has a dimension of LT^{-2} where L is length, and T is time. It can be converted to the corresponding standard SI unit m/s^{2} by multiplying its value by a factor of 0.277777777778.

The direction of the acceleration vector depends on whether the object is speeding up or slowing down and whether the object is moving in the positive or negative direction. The general principle for determining the acceleration is: If an object is slowing down, then its acceleration is in the opposite direction of its motion.

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