2021-2022学年江西省吉安市十校联盟八年级（下）期中物理试卷（附答案详解）

《2021-2022学年江西省吉安市十校联盟八年级（下）期中物理试卷（附答案详解）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2021-2022
ḕᔡᓝ᪥ὶ
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12ூ᪆௃AஹÖᵬ`ÛÿᐜᙠḄ◍ᜧᦑA┯8ஹᙠ!"ᡠᜐḄ%&'ᑮḄ)*+,-☢/01ᑁ34%ᨵᐵ7Ḅ!"ᡠᜐḄ%89:ᑮḄ;Ḅ<=>8ᦑB?@ACஹBCᘤ+ᢣFGHI3BCḄJᘤBCᘤKᐭᙠ☟NOᔜJᘤḄ☢QRᢝTᵫVWXVY+BCᘤKᐭ☟NOBCᘤᔜ3ᑖḄ☢QRᢝTᦑC?@D,ᜧ[=Ḽ/Ḅ]^_8`Ḽab[7cdefᑮᓝeḄh[8ijᙠᑁ3[ḄkᵨIm/ᦑ஺?@஺(1)oḄkᵨᦔq4:o☢rᨵᐵo:o☢rsoḄkᵨᦔqst(2)ChUuv☢Ḅ/0ᩭx᧜ᑁ3ḄᜧḄ=%Ḅ]^_]ᜧ(3)FGHI3BCḄJᘤz{BCᘤ|ᐭdᙠ}~OBCᘤᑁᔜJᘤḄ☢Q+Rᢝᙠd;T☢a+BCᘤḄᳮ(4)ᜧ[=Ḽ/Ḅ]^_8஺⚪ᑮᜧḄஹBCᘤḄᳮḄᵨஹᜧ[4/Ḅᐵ+d⍝ᔠឋḄ⚪஺14.ூᫀ௃BCூ᪆௃AAஹᵫVX?ᱥᙽḄAL=0.6m-0.5m=0.1m,ᦑA┯Bஹᱥᙽᙠ;V^=V=L3=(0.1m)3=1xl0-3m3,ᑣᱥᙽ:ᑮḄ¢oAF=P9Vff=10x103kg/m3x10N/kgx1xl0-3m3=ION,ᡠ£ᱥᙽᙠ;¤¥Ḅ¦oAF=G-F=16N-1QN=6N,ᦑ8?@Cஹᵫ஺=mg=pUgW©ᱥᙽḄªAP=«=ixio-:'ioN/kg=16X103Ḅ//ᦑC?@;

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14Ḅ஺Ø⚪ὃÚoஹḄ7ÔᐵÞ+åæᐸºuḄᮣíîᵨ⌕X⍝ᙠ;T☢oÉᱥðñḄÑoᨬJ᧕┯Ḅ+:o☢rḄᑨÝØ⚪ô1à☢Ḅ☢ra+db◍▟:o☢rᢣḄ+,bᱥö÷øḄ☢rᡠ£ù⚪ḄO᎛dû⌕|üý⌕|ü⚪hᓫÿḄᣚ஺16.ூᫀ௃(1)ᱥ᣸ḄḄᡠᱥᙽ4ᙠ!"ᑮḄ$%F=p&gV᣸=p^gV=1.0x103kg/m3xION/kgx0.2xl0~3m3=2N.(2)ᙠ&'!☟)*+,%-Ḅ.ᦪ0=2.6N,ᓽᱥ4Ḅ1%G=ᨴ=2.6N,ᵫ3$=G-F5678ᱥᙽ4ᙠ!☟)*+,%-Ḅ.ᦪ932=G:3$=2.6N-2N=0.6N(3)ᵫG=mg67ᱥᙽ4Ḅ<=ᑣᱥᙽ4Ḅ?@PA=~=—§=1-3x103kg/m3a“av0.2x10-3^3(I)ᱥᙽaᙠ!"ᑮḄ$%92NB(2)*+,%-Ḅ.ᦪ90.6NB(3)ᱥᙽ4Ḅ?@91.3x103fc/m3,5ூ᪆௃(1)ᱥᙽ4ᙠ!᣸ḄḄ᪷EFGHIJᳮF=pgVLMNᱥᙽ4ᙠ!"ᑮḄ$%B(2)ᙠ&'!☟)*+,%-Ḅ.ᦪᓽ9ᱥ4Ḅ1%᪷E3$=G:3

1517.ூᫀ௃(1)dᑁfᱥḄ1%G=mg=800kgx10N/kg=8000/VB(2)n1fdoᙢ☢Ḅr%3=G-=80000/V+8000/V=88000W,n1fdoᙢ☢ḄrvP=x=4*2/y=11x”‘Pa(3)fdoᙢ☢Ḅᨬᜧr%ᡝ=p'S=1.2x106PaX4X200X10-4m2=96000/V,fdfᱥḄ1%G/=F'=96000N,fdᑁᨬ6fᱥḄ1%G'=GJ-G=96000/V-88000W=8000/V,fdᑁᨬ6fᱥḄ<==£==800kg.(1)dᑁfᱥḄ1%98000NB(2)n1fdoᙢ☢Ḅrv91.1x106paB(3)fdᑁᨬ6800kgḄfᱥ஺ூ᪆௃(1)᪷EG=mg7NdᑁfᱥḄ1%B(2)᪷EF=G7Nn1fdoᙢ☢Ḅr%᪷Ep=x7Nn1fdoᙢ☢ḄrvB(3)᪷Ep=xḄ\F=pS7Nfdoᙢ☢Ḅᨬᜧr%F',᪷EG/=/7NfdfᱥḄ1%᪷EG'=GJ-G᝼7Nfdᑁᨬ6fᱥḄ1%᪷EG=mg7Nfdᑁᨬ6fᱥḄ<=஺S⚪ὃV1%ஹr%rvḄ-ᨵ:ᔠឋ஺18.ூᫀ௃ᔲᨵ¡ᑴ£¤¥ᙠ!Ḅ¦@§ᜧᜧ¨¡ᑴ=ூ᪆௃(1)©rv-Ḅ'?ឋª«ᵨ¬ᢣ¨®¯r°1r£¤¥±²ᨵ³'´µ¶U¸¹º»Ḅ¼@«ᓄB(2)¾¿rvḄÀᨵḄ?@ᐭ!Ḅ¦@ÂÃ!ᨵ¡ᑴÄÅÆᙠ!Ḅ¦@§¶7NḄÇ®¨6☠B(3)?@§rvɦ@ᨵᐵÄÅÆË☢ḄÌËͦrvÍᜧU¸¹º»Ḅ¼@«ÎÍᜧB(4)§:¦@ᔣᔜÑÒᔣḄrv¶ÄÅÆÌ☢ḄÌ˧ÓᦋÄÅÆḄÒᔣU¸¹º»Ḅ¼@«¨ÕÖÒY°¡ᑴ=Y஺ᦑᫀ9(1)B(2)ᔲBᨵ¡ᑴ£¤¥ᙠ!Ḅ¦@§B(3)ᜧBᜧB(4)¨B¡ᑴ=஺(1)rv-ΰᑭᵨU¸!☢Ḅ¼@«ᩭ´rvḄrvÍᜧU¸☢¼Ú16⚓ᐳ20⚓

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