Chapter 1: Units and Dimensions

This chapter is the foundation upon which all of physics is built. We will not be solving complex problems yet, but we will learn the essential "language" of physics.

The key topics are:

• Standards of Length, Mass, and Time: Understanding the fundamental units (like meters, kilograms, and seconds) that we will use to measure everything.

• The International System of Units (SI): Learning the consistent and universal system of measurement used by scientists worldwide.

• Dimensional Analysis: This is a powerful tool to check your work. We will learn how to treat units algebraically to verify that your equations and final answers are physically possible.

In short, this chapter teaches you how to speak, measure, and reason like a physicist before we dive into the laws of motion. Mastering it is crucial for avoiding simple errors in all future chapters.