Calculate the earth's acceleration due to gravity using the relation (derived from calculus) equation: g = 2h / t2 units = meters per second squared (m/s 2 ) where h is the height of the fall and t is the average time of fall.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.