}ĿӰг@ӵĈ܇Ա^ٶȏđwɽʮ@U(xin)Ĕzrоԓ}шģ܇ɿ|(zh)c(din)Կ՚Գٶv0=15m/sđ߅Oc(din)ˮƽڿw1sǡÏAc(din)^ڿ^һΕrg䵽ɽABٶ=53cos53=0.6sin53=0.8
1Ac(din)x߅Oc(din)ˮƽx߶Ȳ
2܇ڿwеĿrgɽϵc(din)xAL
3܇(jng)^Aڿ\(yn)^УxɽABh(yun)xǶ
𰸡15m 250m 33m
ԇ}܇x_Oc(din)ƽ\(yn)Qֱw\(yn)ˮƽ\(yn)ӣ빫ʽɽ}O(sh)܇ڿwеĕrgtc(din)xAc(din)xLY(ji)ƽʽ͎P(gun)ϵ܇ڿwеĿrgɽϵc(din)xALȺ;xɽABh(yun)x
1܇ƽ\(yn)ӣˮƽx1=v0t1=15m
߶Ȟ飺
2O(sh)܇ڿwеĕrgtc(din)xAc(din)xL
Qֱ
ˮƽx=v0t
λP(gun)ϵ飺
(lin)ãt=3s
ˮƽLcos53=x-x1
ãL=50m
3܇ٶcABƽЕrxɽh(yun)O(sh)Oc(din)wxɽh(yun)rgt2
ٶP(gun)ϵ飺
QֱٶȞ飺vy=gt2
(lin)ãt2=2s
Qֱλƞ飺
(j)P(gun)ϵ
l=v0t2-t1-x
xɽABh(yun)xdm=lsin53=3m
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}ĿDʾˮƽõĈAP돽R=1m߅Cc(din)̶һ߶ȲӋ(j)СͰڈAPֱCDϷһlˮƽABcCDƽУҶBcAPAOͬһQֱ߶Ȳh=1.25mڻoֹ|(zh)m=0.4kgKҕ|(zh)c(din)KcgĄĦ(sh)=0.2(dng)һСF=4NˮƽKͬrAPĈDʾλԽٶ=2rad/s@^AOQֱSD(zhun)ӣһΕrgKڻ^m(x)УBc(din)ˮƽǡСͰ(ni)ٶȡ10m/s2
1õ̕rg
2Õrg0.5sKܷСͰ(ni)軬LՈf
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x酢ƽAc(din)r,wܞ٣
wAc(din)Bc(din)^w
3wBc(din)rٶ
4wֹͣxBc(din)h(yun)λϣ
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1w\(yn)ӵA܉Bc(din)rA܉ĉ
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B˕rˮӏҺB(ti)ˮwM(jn)w
Cϵy(tng)Ĝضtƿ(ni)w(ni)ڵĉ(qing)pС
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ٌб܉ĩ{(dio)ˮƽ
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ÿζҪСͬһλoֹ_ʼ\(yn)ӣ
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