ʱ : 【精品试卷】江苏省高邮市八年级物理下册 第十?第一?压强(?课时)导学?无答?(新版)苏科?- 百度文库ϿʼĶ
˽̲ĵ
ʮµһ ѹ ǿ1ʱ
ѧϰĿ
1֪ʲôѹửѹʾͼ֪ѹ 2֪ͨ̽ӰѹЧأ
3ܽѹǿ幫ʽ֪ʵλѹǿĵλPa 4Ӧѹǿ幫ʽѹǿļĶ㡣 Ԥϰ̽ѧ
1. һԣ1ͼ10-1ˮƽѹʾͼ2ͼ10-2ͼֱǽ
ڵѹʾͼ3ͼ10-3бѹʾͼ
ͼ10-1
2. һĶαP76-78⣬ڿͬѧǽ 1 ѹ
2ѹЧ____ʾ ѹǿѹǿļ㹫ʽ
ѹǿĹʵλ 1Pa
3Ԥϰʲô ѧѧ һʲôѹ 1Ԥϰҵ1
˵һ˵ʾͼкιͬ㣿
2壺ֱִ ѹķ ѹ档 3һ飺ѹʲôͬͲͬ㣿
̽ѹЧ
1۲αP76ͼ10-2˼1˭ݵ 2ѹЧԵ
ѡ濼ԾΪƼأ
1
ͼ10-2 ͼ10-3
˽̲ĵ
3ѹЧЩйأ 2飺aֱָѹǦʵˣ
bһƽѹһֵʳָס
3룺ͨѹЧЩйأʲôϵ
1 2 4ϿαP77ͼ10-4ģַ̽ѹõЧ ʾʲôȽѹõЧοƱ 5ʵ飺ѡһַ̽۲ʵ
6ʵۣ1ͬʱ ԽѹЧԽԣ
2ѹͬʱ ԽСѹЧԽԡ
ʲôѹǿ
1ѧУѹǿʾѹЧѹЧԽ Խ 2Ԥϰҵ
1壺 ѹǿĸ ʾ 2ʽ
3ʵλУѹĵλ ĵλΪ ѹǿλΪN/ m
Ϊ 1Pa= N/ m
˵1һСλ2һűֽƽ̯ϣѹǿԼΪ0.5Pa ˼ָ1 mʩ1Nѹѹǿ1Pa һ
1 ͼףΪ1NˮƽֱϣԼΪ1.510m
ԼΪ4.510mƵѹǿ
2 ͼңΪ1N0.2NڣȻǷˮƽֱϣ
ԼΪ1.510mԼΪ4.510m̵ĵԼΪ2.810m̵϶Ƶѹǿ
ѡ濼ԾΪƼأ
2
-22
-42
-32
-42
-2
2
2
2
2
˽̲ĵ
ܽѧ
1________ϵѹѹķ_____ѹ档
2. ͬʱ____________ѹЧԽԣѹͬʱ_______________ѹЧԽԡ
3. ѧУ_____ʾѹЧ__________________________ѹǿ㹫ʽ________ѹǿĹʵλ_______________1Pa=_____
һ룺ڱڿѧϰУһЩʣ
ͨڿεѧϰһЩ⣿
ʮµһ ѹ ǿ1ʱ κҵ
༶ һ⣺
1һűֽƽ̯ϣѹǿԼΪ0.5Pa,ʾ
2. ̽ѹЧĹϵʱֱͼ סʾֵַֻʳֱָѹǦˣ 1 ķ÷δ ȣ 2ͼУǦʱʼ0.5mmָ2N
ѹǦˣʼָѹǿΪ Pa
3ͼʾƽѹָסֹ.ֶ ѹ //Сڣָѹֶ ѹǿ //Сڣָѹǿ 4Сڽʪ֣˫ʱ
һֻţһֻŷݵøԭСѹ ѹǿ
2
ѡ濼ԾΪƼأ 3
˽̲ĵ
(//С)
5һͼñ0.8cmͼ510cmָ ͼñѹ20Nֶͼñѹǿ Paͼ ǽѹǿ Pa.
6йѹѹǿ˵Уȷ
AλܵѹԽѹǿԽ BԽѹǿԽ CԽѹԽ DѹԽСѹǿԽС 7ĵλѹǿǣ
A. m/s B.Kg/m C. N/Kg D.N/m 8. иͼУȷʾ֧ѹǣ
9. Сô
ľ顢ɳ̽ѹЧʲôйءȽϼסͼ˵ǣ
A. ʵͨȽ϶ɳеȽѹ Ч
B. ͼ֪ѹЧĴСй C. ʵõ˿Ʊ
D. ͼ֪ѹЧѹĴСй
11. ͼʾˮƽѩϣѩķΪ70kgûѩأ˶ЬСΪ50kgȴѩء˵ȷǣ A. ѩصѹСС B. ѩصѹСһ C. ѩصλѹСС
D. ѹȣȽ˭ѩصѹǿ
12. ձﺣ⣬ͼձŵѹ ̣ű
A. ѹС B. ѹ
2
2
2
-4
2
ѡ濼ԾΪƼأ 4