 Acceleration is considered to be a derivative ofspeed, taken on time. This is a vector quantity that indicates to which the magnitude of the velocity vector of a body or point when moving in one unit of time changes. On this basis, acceleration not only takes into account the change in speed, but also its direction.

For example, in the case when a body falling on the Earth, neglecting the resistance from air, is able to increase its own speed in one second by almost 9.8 m / s.

Let us find out what the acceleration is measured in thistime. In SI the unit of measurement of acceleration serves per second meter per second, that is, m / s2 (m / s²). Very often, Galom (Gal) is used as an extrasystem unit, which is mainly used in gravimetry, with 1 Gal being equal to 1 cm / s².

Very often in the acceleration measurement,accelerometers. Immediately they are not able to measure the acceleration, since their task is to measure the reaction force of the support that occurs during accelerated motion.