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 ...

Calculating speed from a distance-time graph The gradient of the line on a distance-time graph is equal to the speed. Calculate the gradient of the line using the following equation: ...

Now that I have the angular velocity of the planet, I can just calculate its position in each time step as: Really, it doesn't matter what values you use for G and M.