7. Two uniform cylinders have different masses and different rotational
inertias. They simultaneously start from rest at the top of an inclined plane
and roll without sliding down the plane. The cylinder that gets to the bottom
first is:
(A) the one with the larger mass
(B) the one with the smaller mass
(C)
the one with the larger rotational inertia
(D) the one with the smaller
rotational inertia
(E) neither (they arrive together).
答案:登入後查看
統計: A(0), B(0), C(0), D(1), E(0) #3332066
統計: A(0), B(0), C(0), D(1), E(0) #3332066
詳解 (共 2 筆)
#7397453
所以解這題形狀才是決定滾動快慢的因素
所以在往下滾時,會轉換成兩種型式的動能
分成平移動能和轉動動能

兩者都是均勻實心圓柱
所以都是一樣
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