Physics

Physics courses explain how and why things move, from a falling ball to a circuit to light itself. A typical introductory sequence begins with kinematics (position, velocity and acceleration), moves to Newton's laws and forces, then work, energy and momentum, circular motion and gravitation. Later modules cover oscillations and waves, sound, electricity and circuits, magnetism, optics, thermodynamics, and an introduction to modern physics such as atoms, quantum ideas and relativity.

Physics courses come in three broad styles. Conceptual courses focus on understanding with little math and suit younger learners and curious adults. Algebra-based courses are the standard high school and introductory college track, built on problem solving with equations. Calculus-based courses go further and suit students heading into engineering or the physical sciences. Knowing which one you need is the most important choice, so check the math prerequisites listed in each course.

Most learning in physics happens while solving problems. Expect lessons that set up a physical situation, draw a free-body or circuit diagram, choose the right principle and work through the algebra, then a practice set with full solutions. Many instructors also use simple demonstrations or simulations to make abstract ideas visible. Students use these courses to prepare for a class, review before an exam, or get a second explanation of topics like torque or electric fields.