Physical Quantities Quantity Definition Formula Units Dimensions M E C H A N I C A L ___ Length or Distance fundamental d m (meter) L (Length) Time fundamental t s (second) T (Time) Mass fundamental m kg (kilogram) M (Mass) Area distance2 A = d2 m2 L2 Volume distance3 V = d3 m3 L3 Density mass / volume d = m/V kg/m3 M/L3 Velocity distance / time v = d/t m/s L/T Acceleration velocity / time a = ..