Hello, dear reader! Did you know that there are now seven eBooks available for free from the homepage of motionsystemdesign.com — and that more of these eBooks are on their way?

The tutorials — available as PDFs — are part of a complete Brushing Up series that we've been assembling over the last year — to cover nuclear forces, gravity, microgravity, electromagnetics, centripetal force, transducers, bearings, basics of circuits, and much more.

So if your knowledge of these topics needs refreshing, or if you know of a student that could use a well-illustrated external resource on these subjects, download the new Brushing Up eBooks — without registering — for a thorough yet entertaining look at some of the most important physical forces in the universe.

As always, we welcome your suggestions, requests, and feedback as well. Over the next year, we are publishing five more of these eBooks, so please let us know what you find useful or needing adjustment on this series.

Download the complete series

• Forces of Nature
• Physics in Motion
• Vibration and Lost Motion
• Magnets in Engineering
• Chemistry and Materials
• Simple and Compound Machines
• Statics and Dynamics
• Bearing Basics
• Getting into Gears
• A Review of Circuits
• Units, Standards, and Ratings
• Novel Math in Engineering