原本題目:14. When the position of an oscillating particle is , its velocity v is (A) A cos t (B) -A cos t (C) -A sin t (D) A sin t 修改成為14. When the position of an oscillating particle is x = Acoswt , , its velocity v is (A) A cos wt (B) -A cos wt (C) -Aw sin wt (D) Aw sin wt
14. When the position of an oscillating ..-阿摩線上測驗