試卷名稱:111年 - 111 國立臺灣大學_轉學生招生考試:普通物理學(A)#125314
年份:111年
科目:研究所、轉學考(插大)◆普通物理學
8. Suppose the velocity of a falling sphere of mass m due to the gravity and the air resistance is given by v(t) = v₁(1-e⁻ᵞᵗ) with the condition that the air resistance vanishes when v = 0. The formula of the air drag force is then given by
(A) -2mγv
(B) -mγv
(C) -mγv²
(D) -mγv²/2.