Since the kinetic energy increases with the square of the speed, an object doubling its speed has four times as much kinetic energy. For example, a car traveling twice as fast as another requires four times as much distance to stop, assuming a constant braking force.
Google is your friend. :) Bally is an extremely common prefix to town names in Ireland, and is derived from the Gaelic phrase 'Baile na', meaning 'place of'. It is not quite right to translate it 'town of', as there were few, if any, towns in Ireland at the time these names were formed.
This is why it is very common to see prefixes attached to Irish surnames. 1  Mac, sometimes written Mc, is the Gaelic word for son and was attached to the father's name or trade. O is a word all by itself, signifying grandson when attached to a grandfather's name or trade.