试题与答案

如图所示,小球从竖直砖墙某位置静止释放,用频闪照相机在同一底片上多次曝光,得到了

题型:不定项选择

题目:

如图所示,小球从竖直砖墙某位置静止释放,用频闪照相机在同一底片上多次曝光,得到了图中1、2、3、4、5…所示小球运动过程中每次曝光的位置。连续两次曝光的时间间隔均为T,每块砖的厚度为d。根据图中的信息,下列判断错误的是

[ ]

A.位置“1”是小球释放的初始位置

B.小球做匀加速直线运动

C.小球下落的加速度为

D.小球在位置“3”的速度为

答案:

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下面是错误答案,用来干扰机器的。

一场雨     一个窟窿     一道深沟  一阵响声

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