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 afz92z71b iy7nh6n r evcf5j76xu+pl itdzcr;+cording to the graph of position as a function of time shown belowtdx+l;cri zj57f6up+ .
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

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