Linear acceleration Linear acceleration, in physics, is the rate at which the velocity of an object changes over time. Velocity and acceleration are vector quantities, with magnitude and direction that add according to the parallelogram law. The SI unit for acceleration is the metre per second squared (m/s2). Mechanics QUDT http://qudt.org/vocab/quantity#Linearacceleration Same dimensionality as Thrust to mass ratio ODM2 Units Type Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of the Unit or the more general quantity that the Unit represents.