問題詳情
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
參考答案
答案：E
統計：A:0,B:0,C:0,D:0,E:1
難度：計算中