I know that some people worship Symon's Mechanics 3rd Ed., but I find this book incredibly confusing...especially chapter 7, dealing with rotating coordinate systems. I follow the math, and perhaps the logic, but I can't even find a way to start the homework problems. The guy doesn't give any examples, and how the hell is one supposed to learn how to solve a problem when provided with nothing but dense proofs using strange notation?(adsbygoogle = window.adsbygoogle || []).push({});

For example, problem 7.7 tells us that a body is dropped from heighthabove the earth. We are to calculate the coriolis force as a function of time, given that it has a negligible effect on the motion, and using the velocity of a freely falling body with accelerationGe. Neglect air resistance, assumehis small so thatGecan be taken as constant. Then, calculate the net displacement ofthe point of impact due to the coriolis force calculated previously.

OK , so Symon proves thatGe(r)=g(r)-w x (w x r). (The w represents omega, the Ge represents vector g subscript e.) I guess the coriolis force is the -2mw xd*r/dt term. How are we supposed to solve this. Are we just supposed to KNOW whatwis? Nowhere in this chapter iswgiven for earth. I would think that maybe it would be (2pi/24hrs)*theta^(if theta^=theta hat=unit vector in theta direction). Unfortunately, like Symon my professor rarely works examples either. I have no clue how to go about solving this or most other problems in the book. I there a web site out there that, say, gives clear, step-by-step examples for solving these type of problems? Or does anyone write a "companion book" to be read side-by-side with Symon's that actually works examples for problems like his?

Why the heck did I major in Physics???

Ben

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Coriolis forces, rotating coordinate systems

**Physics Forums | Science Articles, Homework Help, Discussion**