UNIVERSITY OF STEM ENGINE PHYSICS DEPARTMENT LECTURE MATERIAL LESSON 1: UNITS, PHYSICAL QUANTITIES, AND VECTORS OBJECTIVES: At the end of this lecture, the student should be able to: 1. write the base units for mass, length, and time in SI and USCS units; 2. define and apply the SI prefixes that indicate multiples of base units; 3. convert units; 4. differentiate scalar and vector quantities; 5. determine the components of vectors; 6. find the resultant of two or more vectors; and 7. find the addition and product of vectors. PHYSICS – defined as the science that investigates that fundamental concepts of matter, energy, space, and the relationships among them. MATHEMATICS IN PHYSICS Mathematics serves many purposes. It is philosophy, art, metaphysics, and logic. These values are subordinate, however, to its main value as a tool for the scientist, engineer, or technician. One of the rewards of a first course in physics is the growing awareness of the relevance of mathematics. A study of physics reveals applications of basic mathematics. STUDYING PHYSICS 1. The ultimate responsibility for learning rests with the student. 2. Timely learning is efficient learning. 3. Learning is rarely completed in the classroom. 4. Brush up on basic skills. 5. Study the syllabus. 6. Find a class partner and obtain his/her phone number. 7. Organization is the key to effective learning. 8. If you get in trouble, seek help immediately. UNITS MEASUREMENT - a process of detecting an unknown physical quantity by using standard quantity. METRIC SYSTEM – the system of units used by scientists and engineers around the world. BRITISH SYSTEM - these units are used only in the United States and a few other countries, and in most of these they are being replaced by SI units. 1 | Page University of STEM Engine Official Copy