本题目来源于试卷: Angular Momentum，类别为 美国物理杯赛(Physics Bowl)
[单选题]
09.42: A uniform, sol )/u(ttlii r* yn1t)pfr/-i*((rasjz d u v ej0i:ia.65tcwpwid disk with mass M and radius R is rotating on a fixed, frictionless platform with constant angular speed ω0 about a fixed axis through i z0pa(.cs da ru :*/rwitwe(6ij jiv5-ts center. A second uniform solid disk of mass 2M and radius R/2 is placed from rest directly on top of the first disk so that the centers of the disks line up. When equilibrium is established, the disks are spinning at the same rate. What is the angular speed of the disks at equilibrium?
A. $\frac{1}{4}w_0$
B. $\frac{1}{3}w_0$
C. $\frac{1}{2}w_0$
D. $\frac{2}{3}w_0$
E. $\sqrt{\frac{2}{3}}w_0$
参考答案: D
本题详细解析:
暂无
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