大学MOOC 20春-GeneralPhysics-须萍-1(苏州大学)1451735175 最新慕课完整章节测试答案
Chapter11GeneralRotation(2)
Chapter10~11Test
1、单选题:
Consider an object on a rotating disk a distance r from its center, held in place on the disk by static friction. Which of the following statements is NOT true concerning this object?
选项:
A: If the angular speed is constant, the object has a zero acceleration.
B: The object has a tangential acceleration only if the disk has an angular acceleration.
C: The object always has a centripetal acceleration except when the angular speed is zero.
D: If the angular speed is constant, the speed of object is also constant.
答案: 【 If the angular speed is constant, the object has a zero acceleration. 】点我阅读全文
