试题与答案

在做“研究匀变速直线运动”的实验时,得到一条纸带如图所示,A、B、C、D、E、F

题型:填空题

题目:

在做“研究匀变速直线运动”的实验时,得到一条纸带如图所示,A、B、C、D、E、F、G为计数点,每两个计数点间还有4个点未画出,x1 ="1.20cm," x 2 ="1.60cm," x 3 ="1.98cm," x 4 =2.38cm,  x 5 =2.79cm,  x 6 =3.18cm

小题1:为了达到实验的目的,除了有电磁打点计时器、纸带、小车、细绳、导线、小木块、长木板外,还需要的仪器有                  

小题2:根据纸带可判定物体做       直线运动.(选填“匀加速”、“匀减速”或“匀速”)

小题3:电磁打点计时器的工作电压为______,打点周期为________,图中两计数点的时间间隔为T=        

小题4:物体运动在B点的瞬时速度表达式为vB=           (用题目所给符号表示),代入数据计算得vB=       m/s(计算时保留两位有效数字)

小题5:采用“逐差法”计算物体的加速度的表达式为a=                    

(用题目所给符号表示),代入数据计算得a=        m/s2

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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