In the first six chapters, we have talked as if all things were points or boxes which move by sliding or gliding. In this chapter we will discuss the ability of real objects to rotate, stretch, and bend. These topics are slightly more complicated than previous topics, and their study quickly moves beyond the scope of the MCAT. For this reason, we will cover only the main points and the simpler problems. Even so, you may find this chapter difficult. So work carefully, and if you do not understand everything the first time, work through the rest of the book before coming back to it.