本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion，类别为 通用国际物理
[单选题]
Can an object's velocity change deh os2*;gb/ cnirection when its acc. h5 vw8fln9 10w6lstguyvg (leleration is constant? Su6whn1 ll y 5(.90w8vgvs uflgtpport your answer with an example.
A. No, this is not possible because it is always speeding up.
B. No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.
C. Yes, this is possible, and a rock thrown straight up is an example.
D. Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example.
参考答案: C
本题详细解析:
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