A text book on Diploma Engineering Physics is written following the prescribed updated syllabus of WBSCTVE&SD, West Bengal with due emphasis on the fundamentals. The book is design so as to satisfy the need of 1st semester students of all Diploma engineering courses. Basic concepts are explained in simple language. This book namely "Fundamentals of Applied Physics-I" contain the chapter like Physical world, Units and Measurements, Force and Motion, Work, Power and Energy, Rotational Motion, Properties of Matter, Heat and Thermometry.