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試卷名稱：111年 - 111 臺灣綜合大學系統_學士班轉學生聯合招生考試：普通物理C#125313
年份：111年
科目：研究所、轉學考(插大)◆普通物理學
4. A 0.20-kg particle moves along the x axis under the influence of a conservative force field. The potential energy is given by
U(x) = (8.0J/m²)x² + (2.0J/m²)x⁴,
where x is in coordinate of the particle. If the particle has a speed of 5.0 m/s when it is at the origin, what is its speed when it is at x =1.0 m?
(A) 0
(B) 2.5 m/s
(C) 7.9 m/s
(D) 11 m/s
(E) The particle can't reach the position x = 1.0 m.
