Enter known values for motion with constant acceleration, or a fall time for free fall.
v = u + at. s = ut + ½at². v² = u² + 2as. In free fall a = g = 9.81 m/s².
An object dropped for 3 s reaches v = 9.81 × 3 = 29.43 m/s and falls s = ½ × 9.81 × 9 = 44.15 m.