Formula for calculating the velocity of an object that has been in free fall: v = g * t, where g = 9.81 m/s² ( acceleration of the gravity ) and t stays for time, t = 0.10 s. v = 9.81 m/s² * 0.10 s = 0.981 m / s ( or 3.53 km / h ). Answer: The velocity of an object is 0.981 m / s.
