Resistance opposes current thereby reducing the amount of current that flows through a circuit. In other words, it leads to a loss of electrical energy.
Ideally speaking, a good circuit should have no internal resistance as this would lead to more energy having to be supplied to overcome that resistance. External resistance however, is not a bad thing. For instance, oxygen being removed from lightbulbs.
The distance it falls is given by x = (1/2)at^2 where a = acceleration due to gravity = 9.8 m/s^2 x = (1/2)(9.8)(18)^2 x = 1587.6 m The answer is 1587.6 meters
