һλͬѧÿֻĽӴ150cm2˫վˮƽʱԵѹǿ16000PaԵѹʱԵѹǿ-꼶
һλͬѧÿֻĽӴ150cm2˫վˮƽʱԵѹǿ16000PaԵѹʱԵѹǿ |
⣺1˫վʱ s1=2150cm2=0.03m2 Եѹ F=ps=16000Pa0.03m2=480N 2ʱ s2=150cm2=0.015m2 ʱԵѹǿ p'===32000Pa |
רȨ⡰һλͬѧÿֻĽӴ150cm2˫վˮƽʱ..Ҫ ѹǿĴС ȿ⡣Щġ£
ѹǿĴС
ƣѹǿĴС
- 㹫ʽ
P=F/Sʽpλǣ˹ƣ1=1ţ/2ѹFλǣţSλǣ2 - ѹǿʽ⣺
1˹ʽκ塢Һ塢ѹǿ㶼ô˹ʽ
2˹ʽиλֱpPaFNsm2ڼѹǿʱֻеFĵλΪNS ĵλΪm2ʱѹǿĵλPaڼбͳһλ
3һűֽƽʱӵѹǿԼ05PaվʱԵѹǿԼΪ15104PaʾվʱÿƽϣܵŵѹΪ15 104N
4ʽеģѹʹijЩ£ѹֵϵܵҲӦѹʽֱдӦעF=Gã
5ʽеSָ巢αDzҲʵʽӴһıͼʾһԲ̨ˮƽϣֱABַʽãԵѹ䣬ͼAS2ͼBΪS1ǶˮƽСء
6. ɹʽƵF=pSڼѹĴС
ѹǿ
һܶȾȡΪhԲˮƽϣܵѹǿԲ(塢)ѹǿֻܶȺ߶йأ͵أӦùʽܴ㡣
1ͼʾԲĵ뾶֮ 31߶ͬǶˮƽѹǿ֮Ϊ
A31B13C11D9l
ǷԲѹǿֱùʽзΪԲܶͬ߶ͬѹǿͬѡCȷ
𰸣C
- Ƽ
- ͼƼ
һƪͼʾһ绰ʾͼ1ֻ绰ֻ͵绰֮ҪͨŲϢŲеĴٶ_________m/s2绰Ϊ0.64kg-꼶
һƪס¥Сõ綯ֺװϣϵΪ100kggȡ10N/kg1ʹöΪ___________________2ϷˮƽϣĽӴΪ0-꼶
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