Grade 9 Test on Mechanics 20241217 (id: 081c68229)

[单选题]
In Fig. 2-1, what is the vel *de5y9fpb ldoj t3/(domq6 f p: up.xgf7z()hccity at t = 5.5 s?

A. 0
B. 10 m/s
C. 20 m/s
D. -40 m/s


参考答案:  D


本题详细解析: 暂无

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