As part of our Mechanics theme this month, we’re giving away three signed copies of Dustyn Roberts’ awesome Making Things Move. This book is the perfect introduction to understanding basic machines and mechanisms and how to more intelligently incorporate them into your projects.

We’ve been having such a great response to using these giveaways as a way of building a crowdsourced Q&A on a given theme. So, to be eligible for the book drawing, tell us what some of your most pressing mechanics questions. Have trouble figuring out gear ratios? Need to know when to screw it and when to glue it? Need to understand the relationship between force and torque? Whatever your question, ask below. And, as always, if you answer questions from your fellow makers, you will also be eligible for the drawing. Deadline for the drawing is next Tuesday (3/15), 11:59pm PST. Winners will be announced on Wednesday.

Skill Set: Intro to Machines and Mechanisms (with an excerpt from Dustyn’s book)