Open systems and Newtonian mechanics, e. g., rockets, conveyor belts, etc.
Torque and angular momentum – three-dimensional version
Newton's 2nd law for rotation
Separating kinetic energy and angular momentum into parts associated with the overall motion of the center of mass of multiple particles and the motion relative to the center of mass.
Statics
Estimating the period of oscillators from energy considerations
Finding the oscillation frequency of harmonic oscillators using Newton's equations to construct a differential equation