本题目来源于试卷: Physics Bowl by Topic 3: Kinematics - part II Uniformly Accelerated Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.32: An object moving along a l4n wuqm+v1* ,hq.sl luine completes f4 q ho) / ii*z37j1sncozg7.yiip)qaa 20.0 second trip with an average speed of 10.0 m/s in two stages. During stage 1, the object moves with a /s zij 7 y7aqp 4)goiof1)ncq*i3.zi hconstant velocity of 6.0 m/s to the right for 12.0 seconds. What constant magnitude acceleration directed to the left must the object have during the 8.0 seconds of stage 2?
A. $2.5\;m/s^2$
B. $2.7\;m/s^2$
C. $4.0\;m/s^2$
D. $5.3\;m/s^2$
E. $6.3\;m/s^2$
参考答案: D
本题详细解析:
暂无
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