This book covers Mechanics, Heat and Moder physics. The content is brief, concise and summarised with marking points underlined in most cases. A variety of examples have been presented in the book to help a student easily understand numerical calcultions in physics 1 even with out the help of a teacher. A number of exercises have also been included in every chapter and at the end of each numerical calculation question, the answer is placed in high lighted brackets. At the end of every chapter, you will find UNEB questions and their answers dating from 1998 to 2020. This book has been embraced and used but not limited to schools such as Seeta high school, St Marys College Kitende, Kings college Budo, Bishop Cipriano Kihangire s.s.s.