题目内容
某同学为估测摩托车在水泥路面上行驶时所受的牵引力,设计了下述实验:将输液用的500ml玻璃瓶装适量水后,连同输液管一起绑在摩托车上,调节输液管的滴水速度,刚好每隔1.0s滴一滴,该同学骑摩托车,先使之加速到某一速度,然后熄火,让摩托车沿直线滑行,如图是某次实验中水泥路面上的部分水滴(左侧是起点,单位:m)。设该同学质量为50kg,摩托车的质量为75 kg,根据该同学的实验结果可估算(g=10m/s2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500380421613058.png)
(1).骑摩托车加速时的加速度大小为___m/s2;
(2).骑摩托车滑行时的加速度大小为___m/s2;
(3).骑摩托车加速时的牵引力大小为____N
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500380421613058.png)
(1).骑摩托车加速时的加速度大小为___m/s2;
(2).骑摩托车滑行时的加速度大小为___m/s2;
(3).骑摩托车加速时的牵引力大小为____N
(1) 3.79m/s2,(2)0.19m/s2,(3)497.5N
试题分析:匀变速直线运动连续相等时间间隔内的位移之差即
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804232521.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804263378.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804278718.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804294768.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804325702.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804341757.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804356554.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804372622.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003804419662.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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