试题与答案

如下图为一小球从A点沿直线运动到F点的频闪照片，若频闪照相机每隔0.2S 闪拍一

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题型：填空题

题目：

如下图为一小球从A点沿直线运动到F点的频闪照片，若频闪照相机每隔0.2S 闪拍一次，分析照片可知：小球从A点到F点作的是___________运动（选填“匀速直线”或“变速直线”）。小球从B点到F点运动的路程是_________cm，平均速度是_________m／s 。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C解析：[解题思路] 新生儿生后一周内如摄入不足，加之水分丢失、胎粪排出，可出现暂时性体重下降或称生理性体重下降，约在生后3～4日达最低点下降(3%～9%)，以后逐渐回升，至出生后第7～10日应恢复到...

考点：平均速度的计算
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