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]
14.16: A toy car initially m,,oa3 uy gy;(ni2lj+il/ ml mwivi 7.g3p 4es(q 8f3msd3wo7h l(vqfeoves to the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of the car during this time is 1e3o (qd73sm4ls.i3 f( 7 gh8veifqvpw0.0 cm to the left of where it started. Which one of the following choices best represents the magnitude of the average velocity of the car during the five second motion?
A. 50.0 cm/s
B. 10.0 cm/s
C. 4.0 cm/s
D. 2.0 cm/s
E. 0.40 cm/s
参考答案: D
本题详细解析:
暂无
| 
