問題詳情
35. A 10 N tangential force is applied at the edge of a 20 kg disk with a radius of 2.0 m. Then, the disk rotates from rest.What is the kinetic energy of the disk 3.0 s after the force is applied?
(A) 180 J
(B) 360 J
(C) 45 J
(D) 90 J
(E) 23 J
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)