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质点沿直线运动的运动学方程为x=2+6t—t²（SI）,则质点速度为零时x等于

高老师2年前 (2024-05-22)物理（工）(00420)18

质点沿直线运动的运动学方程为x=2+6t—t²（SI）,则质点速度为零时x等于

A.11m

B.10m

C.9m

D.8m

正确答案是A

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