小红在骑自行车上学的路上，看见红灯亮起时，就远远的停止蹬踏，让车自由滑行，车恰好停在斑马线前．小红想：车滑行的距离可能与哪些因素有关呢？她猜想：①车滑行距离与车速有关；②车滑行距离与车的质量有关；③…
小（1）请你也提出一种合理的猜想：与地面潮湿程度有关，你的猜想是依据生活中你观察到的什么现象？下雨天骑自行车刹车时，车滑行距离比较远．（2）小红取来空的圆柱型的玻璃瓶模拟车轮滚动，探究玻璃瓶在水平桌面上滑行距离与质量是否有关．为此，应控制玻璃瓶开始滚动时的初速度&相同，控制的方法是：分别让空瓶和装满水的玻璃瓶从斜面上相同高度处自由滚下．（3）表一和表二是小红探究的实验记录，根据实验的记录可得到结论：滑行的距离与物体的质量无关，根据速度有关，速度越大，滑行的距离越大．（4）根据小红探究的结果和自己的生活经验，请给广大司机提出一条合理化的建议：不要超速行驶．
本题根据雨天骑车刹车后滑行比较远，猜想车滑行的距离可能跟地面的潮湿程度有关，探究车滑行的距离跟质量的关系时，控制速度、地面的潮湿粗糙一定，改变质量的大小，得出实验结论，并且根据实验结论加深理解不超速的根本原因．（1）下雨天，路面上有水，骑自行车刹车时，自行车滑行的比较远，所以车滑行的距离可能跟地面的潮湿程度有关．（2）猜想车滑行的距离可能跟地面的潮湿程度、初速度、质量有关，探究车滑行的距离和质量的关系，控制初速度、地面的潮湿粗糙不变．地面的潮湿程度很好控制，初速度采用如下方法进行控制：把空瓶和装满水的瓶从同一斜面同一高度自由滚下．不同的物体自由下落，下落相同的高度，到达地面的速度是相同的，例如比萨斜塔实验，两个质量不同的小球到达地面的速度相等．（3）由表一得，在质量相同时，滑行的距离跟物体的速度有关，速度越大，滑行的距离越远．由表二得，在速度相同时，滑行的距离跟物体的质量无关．综合分析表一和表二得，车滑行的距离跟物体的质量无关，跟物体的速度有关，速度越大，滑行的越远．（4）根据实验结论，给司机的建议：不要超速行驶．故答案为：（1）与地面潮湿程度有关；下雨天骑自行车刹车时，车滑行距离比较远；（2）初速度；分别让空瓶和装满水的玻璃瓶从斜面上相同高度处自由滚下；（3）滑行的距离与物体的质量无关，根据速度有关，速度越大，滑行的距离越大；（4）不要超速行驶．提示信息 -
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