English: Log-log plot of velocity (${\displaystyle v/c}$), Lorentz factor (${\displaystyle \gamma }$), rapidity (${\displaystyle \eta }$) and ${\displaystyle K/mc^{2}=\gamma -1}$ versus proper velocity (${\displaystyle w/c}$) or ${\displaystyle p/m}$, where ${\displaystyle c}$ is lightspeed, ${\displaystyle m}$ is mass, ${\displaystyle p}$ is momentum, and ${\displaystyle K}$ is kinetic energy. Note how ${\displaystyle v/c}$ tracks ${\displaystyle w/c}$ at low speeds, while ${\displaystyle \gamma }$ does this at high speeds. If the elbowed curve (${\displaystyle \gamma -1}$) is plotted against parameters multiplied by a range of masses, one obtains a family of kinetic energy versus momentum dispersion curves that makes contact with much of modern and everyday physics. Vectorized version of File:VelocityParameters2.png