Rajesh walks 2 km to south, then turns northeast, and walks 3 km. Then he turns south and walks 2 kms. Then he turns west and walks 4 kms. Finally, he turns northwest and walks 5 kms. In which direction is he from his starting point?
During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.