论文部分内容阅读
考查类型一“径赛”问题【创新1】甲、乙两运动员在训练交接棒的过程中发现:甲经短距离加速后能保持9m/s的速度跑完全程;乙从起跑后到接棒前的运动是匀加速的.为了确定乙起跑的时机,需在接力区前适当的位置设置标记.在某次练习中,甲在接力区前s_0=13.5m处作了标记,并以v=9m/s的速度跑到此标记时向乙发出起跑口令.乙在接力区的前端听到口令时起跑,并恰好在速度达到与甲相同时被甲追上,完成交接棒.
A, “track” problem [innovation 1] A, B two athletes in the transfer process of the transfer bar found: A by a short distance acceleration can maintain the speed of 9m / s run the full course; B from the start to the In order to determine the timing of the start of B, a marker should be set at a suitable position in front of the relay zone, and in a practice, A is marked at s_0 = 13.5m in front of the relay zone and marked with v = 9m / s run to this mark to start issuing a password to B. B in front of the relay area to hear the password when the start, and just reached the same speed and A was caught up, completed the delivery of the stick.