＜Newton's Equation of Motion＞ Newton's Equation of Motion is described as below \[m\frac{d^2{\boldsymbol r}}{dt^2} = {\boldsymbol F} \] Here, is the position vector of point mass whose mass is m, and is the force vector acting on the poi…

＜Long time, No hear＞ Never for a long time have I heard the Japanese popular song "LOVE LOVE LOVE" which was released by DREAMS COME TRUE in 1995. These few days I heard it many times because it has been used as BGM in SUBARU TV-commerci…