Calculus is an essential tool for physics. It’s a very basic area of mathematics which you cannot avoid with if you truly want to understand physics. Calculus was first discovered by Newton to apply it for physics, even though it is widely believed that Leibniz discovered it independently, despite the fact that Newton accused Leibniz of plagiarism. Calculus is composed of two parts: differentiation and integration. Interestingly, integration is anti-differentiation. If I make an analogy, integration is to differentiation as subtraction is to addition and division to multiplication. In the first part of the crash course, I explain differentiation, which is also called “taking the derivative.”