Parameters and Typical Relationship (id: 66b467798)

本题目来源于试卷: Parameters and Typical Relationship，类别为 美国物理杯赛(Physics Bowl)

[单选题]
12.17: A mass moves accordinpx 1u:dzcm2 lo 1d9d-xy6gz:w g to the graph of position as a fuith kn;sj/n(9nction of time shown be(s/9h;knn j itlow.
Which one of the following choices correctly represents the time instants or time interval for which the instantaneous velocity of the mass is considered always to be negative? Lettrepresent time.

A. $t = 0.0 s, t = 5.0 s, and t = 10.0 s$
B. $0.0 s < t < 2.5 s$
C. $ 2.5 s < t < 7.5 s$
D. $5.0 s < t < 10.0 s$
E. $2.5 s < t < 10.0 s$


参考答案:  C


本题详细解析: 暂无

微信扫一扫，分享更方便