This app provides fun conceptual physics questions about real world in the form of quiz. The feedback is shown right after a question is answered so that the audience can gain a good understanding of important physics concepts. This app asks questions about classical mechanics at the level of college or university physics. The questions were carefully prepared by the app author, who has extensive teaching experience in both a large university and a small liberal college. The quiz is useful for enhancing college students' understanding of key physics concepts about classical mechanics. The quiz may also be used by high school students as well as any person interested in revealing the secrets about the real world around us. This is a lite version, which has a limited number of questions. The full version have many more questions and new questions will be continuously added to the full version.