本题目来源于试卷: Physics Bowl by Topic 2: Kinematics - part I General Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
07.17: A toy car moves along the x-a /gm + hfa0bpv)4li4n y fydpw7ka-m(f-e 7rs 5xis according to the velocity versus time curve 5-7yea-r m7 pfkf(swd shown to the right. When does the car have zero acceleration?
A. at 2 and 4 seconds
B. at approximately 3.0 seconds
C. at approximately 3.3 and 5.1 seconds
D. the acceleration is always zero
E. at no time
参考答案: A
本题详细解析:
暂无
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