In this lecture, Leonard Susskind continues his discussion of Einstein's theory of general relativity. He also gives a broad overview of the field of tensor calculus and it's relation to the curvature and geometry of space-time. This Stanford Continuing Studies course is the fourth of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University. Stanford Continuing Studies: continuingstudies.stanford.edu/ About Leonard Susskind: www.stanford.edu/dept/physics/people/faculty/susskind_leonard.html Stanford University Channel on YouTube: www.youtube.com/stanford