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]
Human reaction time is usua9blokdjjj pky)i,s s9 x60y0 5 m3ja9bl0t50oqfeht .6t vzah *ly greater than 0.10 s. If your friend holds a ruler between your fingerthtz0v50hf6.a oq *ets and releases it without warning, 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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