本题目来源于试卷: Simple Harmonic Motion: Parameters and Typical Relationship，类别为 美国物理杯赛(Physics Bowl)
[单选题]
11.18: The motion of an object moving along a straight line is give , a 98du1dmiz: m(qahdn by th ao 0ut(cpl0 c4 qwlq;lb8*i:se velocity cot(8wlq0s4 b:0 lpq;aiu*c lvs. time graph shown.
Which one of the following choices best represents the average acceleration of the object during the time interval from t=4.0 sto t=9.0 s?
A. $0.80 m/s^{2}$
B. 0
C. $-0.80 m/s^{2}$
D. $-1.60 m/s^{2}$
E. $-3.2 m/s^{2}$
参考答案: D
本题详细解析:
暂无
| 
