The metre per second squared is the unit of acceleration in the International System of Units. As a derived unit it is composed from the SI base units of length, the metre, and the standard unit of time, the second. Its symbol is written in several forms as m/s², m·s−2, or m s−2. As acceleration, the unit is interpreted physically as change in velocity or speed per time interval, i.e. metre per second per second and is treated as a vector quantity. Wikipedia [ - ]

The metre per second squared is the unit of acceleration in the International System of Units... [ + ]