Work
Work is the transfer of energy by force acting on an object that is displaced
Work is a form of energy: conservation of energy means that the energy of a system increases by the amount of work done on it
Example: it takes work to raise a body and increase its potential energy
- Work is needed to raise a roller coaster to the top
Formula: W = F x cos(q)
- W = 0 for force perpendicular to displacement (such as the effect of a centripetal force on a body moving in a circle)
- W = Fx for force parallel to displacement