what determines how fast object will fall on earth
The formula for determining the velocity of a falling object after a time of t seconds is vf = g * t (dropped from rest) where g is the acceleration of gravity. The value for g on Earth is 9.8 m/s/s. The above equation can be used to calculate the velocity of the object after any given amount of time when dropped from rest. Example calculations for the velocity of a free-falling object after six and eight seconds are shown below. Example Calculations: