問題詳情
40. A uniform disk of mass m and radius R is rotating about its symmetric axis at an angular velocity ω0. A ring of the same mass m and radius R originally at rest suddenly drops on the disk. Due to friction, the disk and the ring finally rotate together at a constant anular velocity ω. What is the kinetic energy loss during this process?
(A)
(B)
(C)
(D)
(E) Energy is conserved, so there is no energy loss.
參考答案
答案：C
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中