Recent content by readingforev

Where would an observer have no forces acting upon him? How is it used to quantify the kinematics? Thank you for your patience.

(Please forgive me for the obvious stupidity of this question) I'm trying to understand Newton's laws down to the last detail, because that is how I study things. However, where would the principle of inertia ever take place? And since Newton's laws are only applicable in an inertia frame...