1.1 What is friction? Take this everyday example: when a coffee mug rests on a flat table, the kinetic frictional force is zero. There is no force trying to move the mug across the table, so there is ...

Unbalanced forces are generally due to a forward force (or thrust) and a frictional force working against each other. Friction is a force that opposes motion. It is present whenever two surfaces rub ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...