Given two events, (x1, t1) and (x2, t2), use a spacetimediagram to fi nd the speed of a frame of reference inwhich the two events occur simultaneously. What valuesmay s2 have in this case?
Notes Week 1 Physics Modules 1.1-2.1 1.1 The Nature of Physics Physics is not just a collection of facts and principles, but it’s the process by which we understand the Universe. Is a theory ever concrete and unchangeable No, theories are subject to change according to observations. 1.2 Solving Physics Problems The way physics is set up, we need to be able to learn problem-solving strategies. I SEE Identify, set up, execute, and evaluate. a. Identify i. Identify the target variables of the problem (the quantities you want to find) b. Set Up i. Set up the problem, choose the appropriate equations and decide if you are going to need them. Sketch a graph if you need to. ii. Estimate and predict what the results will be. Predict the physical behavior of a system. c. Execute i. Do the math d. Evaluate i. Check to see if the predictions match your answer. Once you are done ask yourself how you will work on harder problems similar to the one you worked on. Idealized models In physics a model is a simplified version of a physical system that would be too complicated to analyze in full detail Using models makes life a lot easier so that physicist can analyze a situation without too much problem. 1.3 Standards and Units Any number that is used to describe a physical phenomenon quantitively is called a physical quantity. Examp