本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion，类别为 国际高中通用物理
[单选题]
Human reaction time is usually gjqc1x5x di 23oq-xw-h reater than 0.10 ssk0 wx)o0n ,,gaia/ec . If your friend holds a ruler between your fingers and releases it without warni0ca, ,e/io)asw0nk g xng, how far can you expect the ruler to fall before you catch it?
A. at least 3.0 cm
B. at least 4.9 cm
C. at least 6.8 cm
D. at least 9.8 cm
参考答案: B
本题详细解析:
暂无
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