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ʲôѹǿ?ѹǿĶ壺ܵѹ֮ȽѹǿѹǿȽѹЧѹǿԽѹ

ѹǿĶ㷽ʽ.(1): ѧаѴֱѹϵѹ. ĵλܵ

ʲôѹǿ,㹫ʽʲô?ܵѹ֮ȽѹǿѹǿȽѹЧѹǿԽѹЧԽԡѹǿļ㹫ʽǣp=F/Sѹǿĵλ˹Pa

ʲôѹǿ?嵥λܵΪѹǿڹ̼ϳϰߵسΪѹPʾλΪPaԾգѹΪ׼

ѹǿĶѹǿٴֱ嵥λϵѹ.ĵλܵѹĴСѹǿ.(2

ѹǿʲô˼ܵѹ֮ȽѹǿѹǿȽѹЧѹǿԽѹЧԽԡ

ѹǿʲôѹǿָѹĴС֮ȡȽѹЧѹǿԽѹЧԽԡѹǿļ㹫ʽǣp=F

ѹǿĸѹǿǵλܵѹӢĸPʾģλPA ʽҼǵõ P=F/S FܵS P=gh

ʲôѹǿ?ͨ׵㡣λܵѹһƽܵѹСѹǿСʽʾΪp=F/s

ʲôѹ?ѹķ?ѹǿ.ѹǿĶ.ѧаѴֱѹϵѹ.ѹķӴ洹ֱ.ѧа嵥λ

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