1、先统一单位,摩托车车速72km/h=20m/s,汽车车速16m/s,1min=60s
2、摩托车通过检查站时,汽车运动距离 16m/s * 60s = 960 m
3、摩托车追赶上汽车需要花的时间 960m/(20m/s-16m/s)= 240 s
4、此时汽车和摩托车距离检查站:20m/s * 240s = 4800m 或 16m/s * (240s + 60s) = 4800m
1、先统一单位,摩托车车速72km/h=20m/s,汽车车速16m/s,1min=60s
2、摩托车通过检查站时,汽车运动距离 16m/s * 60s = 960 m
3、摩托车追赶上汽车需要花的时间 960m/(20m/s-16m/s)= 240 s
4、此时汽车和摩托车距离检查站:20m/s * 240s = 4800m 或 16m/s * (240s + 60s) = 4800m