题目

There was a kingdom long, long ago. It was ruled by king who loved riddles. Once a year the king made a new riddle. He gave a prize to the person who could solve the riddle. There was a baker who also lived in this kingdom. Everyone agreed that he baked the finest breads. The baker had almost everything he needed except for a horse. If the baker had a horse, he could sell his fine breads from one end of the kingdom to the other. One year the king made a new riddle that puzzled everyone. I will give a prize to the personwho can solve my riddle, the king said. Whoever wins will have the pick of4．在“探究小车速度随时间变化的规律”实验中，打点计时器使用的交流电的频率为50Hz，记录小车做匀变速运动的纸带如图1所示，在纸带上选择0、1、2、3、4、5共6个计数点，每相邻两计数点之间还有4个实验点未画出，纸带旁并排放着带有最小分度为mm的刻度尺，零点跟“0”计数点对齐，请你回答下列问题：（1）完成下列表格计数点到0的距离（cm ）d01=1.60d02=3.40d03=5.40d04=d05=小车打各计数点时的速度（m/s）v1=0.17v2=0.19v3=0.21v4=（2）在如图2的平面直角坐标系中作出v-t图象（铅笔描点作图）（3）由图可知小车的运动性质：匀加速直线运动小车的加速度a=0.20m/s2（保留两位有效数字）