This lecture discusses examples of reference frames in uniform rotation, such as a carousel and inertial reference frames. It covers the concept of Galilean and non-Galilean reference frames, forces in inertial and accelerated reference frames, and the second law of Newton. The lecture also explores the forces in a pendulum in a car accelerating constantly, the apparent gravity, and the forces in an inclined plane accelerating to the left. It concludes with the application of Newton's second law in different scenarios.