3. A thin uniform rod of mass M and length L is positioned vertically above an anchored frictionless pivot point, as shown below,
and then allowed to fall to the ground. At what speed does the free end of the rod strike the ground?
(A)
(B) 
(C)
(D)
(E)
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統計: A(1), B(9), C(35), D(1), E(0) #2336703
統計: A(1), B(9), C(35), D(1), E(0) #2336703
詳解 (共 2 筆)
#6039924

ㅤㅤ
順便背一下其他的轉動慣量
環 Hoop k=1
盤(穿圓心) Disc k=1/2; 盤(穿平面) Disc k=1/4
空球 k=2/3
實球 k=2/5
長棒(質心) k=1/12;長棒(端點) k=1/3
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