■解答
① \(\beta(z_c-\displaystyle\frac{l}{2})\) ② \(evB_1\) ③ \(x\)軸の正の方向
④ \(vB_1l\) ⑤ \(v\beta l^2\) ⑥ \(\displaystyle\frac{v\beta l^2}{R}\)
⑦ \(-I\beta l^2\) ⑧ \(\displaystyle\frac{mgR}{\beta^2l^4}\) ⑨ \(\displaystyle\frac{m^2g^2R}{\beta^2 l^4}\)
⑩ \(1\)
