Acceleration, in physics, is the rate at which the velocity of an object changes over time. An object's acceleration is the net result of any and all forces acting on the object, as described by Newton's Second Law. [1] The SIunit for acceleration is the metre per second squared (m/s2). Accelerations are vectorquantities (they have magnitude anddirection) and add according to theparallelogram law.[2][3] As a vector, the calculated net force is equal to the prod