3. A certain spring that obeys Hooke’s law is stretched by an external agent. The work done in
stretching the spring by 10 cm is 4 J. How much additional work is required to stretch the spring
an additional 10 cm?
(A) 2 J
(B) 4 J
(C) 8 J
(D) 10 J
(E) 12 J
詳解 (共 2 筆)
未解鎖
U =1/2 k x ^ 2 = 1/2...
未解鎖
1. 題目解析 這道題目涉及到胡克定律...
阿摩線上測驗
登入
