A mass hung from a spring undergoes simple harmonic motion when displaced from its equilibrium position. Changing the quantity of the mass affects the period of oscillation of the system. Place two ...

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 ...

For example, in the U.S. Imperial system, mass can be formally measured in “pound-mass” (lbm) and force in “pound-force” (lbf) instead of Newtons. (One lbm is equivalent to 0.45 kilograms.) ...