一辆汽车以36km/h的速度向一座山崖匀速直线行驶，此时空气温度15℃，在行驶的过程中汽车鸣笛，经 一辆汽车以36km/h的速度向着山崖匀速行驶

\u4e00\u8f86\u6c7d\u8f66\u4ee536Km/h\u7684\u901f\u5ea6\u671d\u5c71\u5d16\u5300\u901f\u884c\u9a76\uff0c\u5728\u79bb\u5c71\u5d16700m\u5904\u9e23\u7b1b\u540e\u6c7d\u8f66\u76f4\u7ebf \u770b\u8865\u5145\u3002\u3002\u3002\u3002\u3002\u3002

\u89e3\uff1a\u901f\u5ea6\uff1a36km/h=10m/s \u5df2\u77e5\u58f0\u97f3\u5728\u7a7a\u6c14\u4e2d\u7684\u4f20\u64ad\u901f\u5ea6\uff1a340m/s
\u8bbe\u6c7d\u8f66\u884c\u9a76x\u79d2\u540e\u542c\u5230\u56de\u58f0
10x+340x=1400\uff08700\u4e58\u4ee52\uff09
\u89e3\u5f97x=4
700-10x4=660(m)
\u7b54\uff1a\u542c\u5230\u56de\u58f0\u65f6\u6c7d\u8f66\u8ddd\u79bb\u5c71\u5d16\u6709660\u7c73\u8fdc\u3002

\uff08\u6700\u597d\u518d\u9a8c\u7b97\u4e00\u904d\uff0c\u4e0d\u786e\u5b9a\uff01\uff09

\u8bbe\u6240\u6c42\u65f6\u95f4\u4e3at
\u6c7d\u8f66\u901f\u5ea6V1=36km/h=10m/s,\u58f0\u901fV2=340m/s
\u5728\u65f6\u95f4t\u5185\uff0c\u8f66\u524d\u8fdb\u8ddd\u79bbS1=V1*t=10t
\u5587\u53ed\u58f0\u4f20\u6016\u7684\u8def\u7a0b S=845+(875-S1)=2*875-10t
\u800c S=V2*t=340t
\u6545 2*875-10t=340t
t=5s

36km/h=10m/s
s1=(10+340)×2/2=350m
s2=10×2=20m
s=s1-s2=330m
所求距离是330m

320

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