2021-2022学年福建省福州八年级（下）期中物理试卷（附答案详解）

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20ᑣᱥ4K᣸Q4Ḅ(᣸=<3-F,4\<=G/ᓽF1-<2=<3-]23ᱥ4ᑮḄᜧFV᣸Q4ᡠ_`ᦑ⌱A஺ᦑcᫀ'(1)ef(2)gᑮhB(3)(ஹᵬஹ+ஹ,(4)&-<2(5)MF(6)4஺(1)iᵨklmn⌕ᐜqrstef(2)⌕uvwᱥ4᣸ḄḄxynḄQ☢{|ᑮhB(3)xy⌕ᐜᱥ4!T᫜Ḅᯠ~ᱥ4ᙠᨬ~᣸Ḅ!T᫜ḄI(4)᪷<=G-F⊤(5)᪷AḄ᣸ḄḄḄᜧFᑖ᪆(6)᪷1,!(23T᫜Ḅ!ᱥ4K᣸Q4V᫜ḄI2᣸Q4Ḅᱥ4ᑮḄV᣸Q4Ḅᐵstc⚪⌕ὃḄஹᑖ᪆ஹq¡¢£¤¥ᳮḄᳮ`¦§¨xy©ª«¬ᘤḄ¯ᵨ!°Ḅᐵ±஺31.ூcᫀ௃(1)µᜧ☜q·¸☢Ḅ¹'F=G=mg=(72kg+3kg)xlON/kg=750N(2)µᜧ☜q¸☢Ḅ¹º'P=£=-7»2=2.5x105Pa«-S30xl0-47n2c(1)µᜧ☜q·¸☢Ḅ¹'750N(2)µᜧ☜q¸☢Ḅ¹º2.5x105Pcioூ᪆௃(1)µᜧ☜q·¸☢Ḅ¹`¼µᜧ☜!¸ᑐḄI᪷F=G=mgµᜧ☜q·¸☢Ḅ¹(2)¾3¸ᑐV¸☢ḄI¿À☢Á᪷p=9µᜧ☜q¸☢Ḅ¹º஺⚪ὃ¹!¹ºḄmÃᐵ±3⍝·☢Åᱥ4Ḅ¹!ÆÇḄ_`mÃDE⌕ÈÉᓫËḄᣚÃ஺32.ூcᫀ௃(1)T᫜q·ᙢ☢Ḅ¹F=G=mg=3kgx10N/kg=30N,᫜ÎᑁÐÎ☢ÁS=600cm2=6x10~2m2,᫜q·ᙢ☢Ḅ¹ºF30Np=-=-----------=5rn0A0nPaLS6xio_27n2(2)\᫜ÑÒÓḄKḄÔÕh=Lᡧ×᫜ÎᑮḄ¹º

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Ḅᜧ22⚓ᐳ23⚓

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