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 line com.eh*6 drqd,uvpletes a 20.0 second trip with an averagq6* .uddevh r,zxk-v ;/ hno4v*udi -cpa9gl 7e speed of 10.0 m/s in two stages. During stage 1, the object moves with a constant plhd ai*xo/ u cv4n-z9gk;-7vvelocity 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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