Physics 1422, General Physics I-A

Dr. Yost

Announcements:

I hope you learned a lot in the course, and enjoyed your experience. You should find what you learned helpful in the future. If you need anything after the course, or are interested in studying more physics, please feel free to contact me.

All grades, including the final exam and final course grade, are now on Blackboard. More information can be found on the grades page. Note that the numerical grade calculated by Blackboard is not used to calculate the letter grade. It is only an estimate.

The answers to the final exam may now be found on CAPA. You may open it as it as set 18 in the usual manner. Explanations are shown with each answer. Note that the order of the choices as well as the questions is different for each exam. I recommend reading these if you plan on using physics again in the future (and I believe most of you will), since the answers could help in correcting some common misconceptions.

A complete collection of the lectures may be found on Blackboard.

Welcome to Physics 1422, General Physics I-A for science and engineering students! This course is an introduction to the physical concepts of mechanics and thermodynamics. By the end of the course, you should be familiar with Newton's Laws, forces, work and energy, momentum and inertia, rotational motion, oscillation and waves, heat, and temperature.

This course differs from PHY 1425 in that it requires only concurrent enrollment in Calculus 1 (MTH 1321), not previous completion of a calculus course. Thus, physics and calculus are learned together, as is appropriate, since Newton invented calculus for the purpose of formulating his laws of mechanics. The relaxed prerequisite does not mean that this course is any less rigorous than PHY 1425. On the contrary, the use of a second textbook, A. P. French's Newtonian Mechanics (M.I.T. Physics Series) in the early parts of the course will help us to explore the interplay between physics and the underlying mathematics more deeply than may otherwise be possible. This course will be very useful for any students who wish to begin their physics studies immediately, without waiting to complete MTH 1321.

Physics is a hands-on subject! You cannot do well by watching your professor work problems on the board, or by asking your friends to show you how they did them. There is absolutely no substitute to struggling through the problems yourself. Do not leave the problems to the last minute. Those who do this normally do not learn the material well, and have disappointing performance on the exams. The due dates will be kept close to the completion date for each chapter to encourage starting the problems early.

Your grade in the course should largely reflect the amount of effort you put into the homework. However, it is a mistake to make completing the homework your only goal. The real goal is to understand the material, and to do this well, you must first read the chapter, and not blindly try to start on the problems, hoping you can skim the material for the right equations to use. That approach may get you through the homework more quickly, but without the understanding you will need to apply your knowledge in new contexts, including the exams. If you have trouble with one of the problems, go back and read the chapter some more, or try some different problems and come back to it.

The mathematical tools we will use include algebra, trigonometry, geometry, and vector algebra. Everyone should have a comfortable working knowledge of algebra and trigonometry, since these used extensively on a daily basis. In physics, mathematics is not just a means of solving problems, but the language in which the fundamental ideas are expressed. Any weakness in these areas will have a strong impact on your understanding of physics. You should consider a tutor if you feel you need one. Vector algebra is needed any time we want to describe quantities that have a direction. If you are not already familiar with vectors, you will be soon.

Calculus was invented to describe the kind of physical problems we will be considering, and is essential for the most general treatment, as Newton first realized. This course should be taken concurrently with a calculus course, and you should find that the two forces help to reinforce each other. Seeing calculus a physical context will help you understand the concepts of differentiation and integration more fully and intuitively.

All students taking PHY 1422 must also sign up for a laboratory session. The laboratory must be passed independently, with an average of not less than 60% (normalized to an average of 85%), to pass this course.