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 ...

The questions in this quiz are suitable for GCSE physics students studying gravitational fields, weight, mass and gravitational field strength, how to calculate work done, free body diagrams and ...

No matter what that Intro to Physics book says, you can't calculate the "work done by friction." Nope. Doesn't work. Don't even try it.