Grade 9 Test on Mechanics 20241217 (id: 69898c7bb)

[单选题]
A cart starts from restmx2anzfmw(8 ex 8v/9j and as9/wp t(;c zevdi6vg )ccelerates at $4.0 \; m/s^2$ for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of $2.0 \; m/s^2$ for 4.0 s. What is the final speed of the car?

A. 20 m/s
B. 16 m/s
C. 12 m/s
D. 10 m/s


参考答案:  C


本题详细解析: 暂无

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