問題詳情
7. A rope of mass M and length L hangs vertically.What is the time T needed for apulse to travel from the bottom end to the support?
(A)
(B)
(C)
(D) 2 (Lig)；
(E) None.
7. A rope of mass M and length L hangs vertically.What is the time T needed for apulse to travel from the bottom end to the support?
(A)