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É o esforço que tende a encolher a estrutura em questão.

",{"_44":41,"_82":87,"_84":88},"B","

É o esforço que tende a esticar ou alongar a estrutura em questão.

",{"_44":90,"_82":91,"_84":92},"4ac6e378-bee3-4281-a336-77e50be73ee0","C","

É o esforço que tende a normalizar a estrutura em questão.

",{"_44":94,"_82":95,"_84":96},"b2154267-134a-42e1-a9a8-645b3b96c94e","D","

É o esforço que tende a fixar a estrutura em questão.

","solution_explanation","statement","

O que significa esforço de tração?

","status","pending_classification","hasRelatedVideo","relatedVideos",[105],{"_106":107,"_125":126,"_52":141,"_176":177,"_194":195},"content",{"_44":108,"_58":109,"_110":-5,"_111":112,"_113":114,"_115":-5,"_46":116,"_119":120,"_121":120,"_122":-5,"_123":124},"468e3e62-35e0-47be-a15f-68dd43bb32bb","Óptica Geométrica - Parte 1","description","content_type_id","1051eee7-c62e-4b2c-9900-77a29fcec080","resource_id","fa6aaf42-4cc4-4d76-8915-7a67081f7e9a","user_id",{"_117":118},"external_id","4963","created_at","2025-08-20T12:27:41.608438+00:00","updated_at","content_group_id","slug","optica-geometrica-parte-1","prometheusData",{"_127":128,"_134":135,"_136":137,"_138":139,"_28":140},"provider",{"_44":129,"_130":131,"_132":133},"06f120be-2194-4548-8336-7ba44ffbae14","key","grupo_q_proteus","kind","proteus","reference","d80487a0-0f98-42c8-99bb-551165ba3068","state","completed","thumbnail_url","https://proteus.grupoq.io/videos/d80487a0-0f98-42c8-99bb-551165ba3068/thumbnailsthumb.0000000.jpg","https://proteus.grupoq.io/videos/d80487a0-0f98-42c8-99bb-551165ba3068/levels.m3u8",[142],{"_44":143,"_58":144,"_60":145,"_146":147,"_148":-5,"_119":149,"_121":149,"_46":150,"_123":145,"_157":158},"9772e958-72c6-4499-ad47-877cf94d670d","Exatas","exatas","tag_group_id","c1ce2cf2-b217-4cc7-8182-81c56bd3522d","parent_id","2025-04-29T01:56:45.284172+00:00",{"_151":152,"_153":154,"_155":156},"childrenCount",18,"content_count",0,"question_count",135489,"children",[159],{"_44":160,"_58":161,"_60":162,"_146":147,"_148":143,"_119":163,"_121":163,"_46":164,"_123":167,"_157":168},"ca6fee0e-79c6-4f1c-b500-ee081a071949","Mecânica","mecanica","2025-04-29T02:19:12.828432+00:00",{"_151":165,"_153":154,"_155":166},10,19948,"mecanica-2",[169],{"_44":170,"_58":59,"_60":61,"_146":147,"_148":160,"_119":171,"_121":171,"_46":172,"_123":174,"_157":175},"ac55bdba-154d-42e7-bc25-72dde822663d","2025-04-29T03:44:29.139762+00:00",{"_151":154,"_153":154,"_155":173},3376,"resistencia-dos-materiais-4",[],"video",{"_44":114,"_13":109,"_110":-5,"_178":179,"_180":181,"_28":-5,"_182":-5,"_127":181,"_183":184,"_138":-5,"_185":-5,"_186":-5,"_187":-5,"_188":-5,"_46":189,"_190":154,"_191":-5,"_100":192,"_119":193,"_121":193},"duration",20,"source_type","prometheus","iframe_url","provider_video_id","1cd3d633-d690-4f4b-9995-9b0e44994e35","format","quality","file_path","file_size",{"_117":118},"views_count","last_played_at","draft","2025-08-19T11:56:20.758718+00:00","tag",{"_44":143,"_58":144,"_60":145,"_146":147,"_148":-5,"_119":149,"_121":149,"_46":196,"_123":145,"_157":197},{"_151":152,"_153":154,"_155":156},[198],{"_44":160,"_58":161,"_60":162,"_146":147,"_148":143,"_119":163,"_121":163,"_46":199,"_123":167,"_157":200},{"_151":165,"_153":154,"_155":166},[201],{"_44":170,"_58":59,"_60":61,"_146":147,"_148":160,"_119":171,"_121":171,"_46":202,"_123":174,"_157":203},{"_151":154,"_153":154,"_155":173},[],"similarQuestions",[206,237,257],{"_40":207,"_42":43,"_44":208,"_78":209,"_97":225,"_98":226,"_52":227},"112831da-be9c-458e-94cb-e8292d0dba12","3c0b9441-b878-4896-8bac-fa4ca61e3f13",[210,213,216,219,222],{"_44":211,"_82":83,"_84":212},"265bd71a-6749-41f5-b291-67efd646ca64","y'' + 2y' - 3y = 0",{"_44":214,"_82":87,"_84":215},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_44":217,"_82":91,"_84":218},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_44":220,"_82":95,"_84":221},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","9y'' + 6y' + y = 0",{"_44":207,"_82":223,"_84":224},"E","y'' - 2y' + 6y = 0","Somente em y''−2y'+6y=0 o polinômio característico r²−2r+6=0 tem Δ<0, gerando raízes complexas conjugadas (1±i√5) e, portanto, solução em termos de exponencial modulando seno e cosseno. Nos demais itens (a–d) o discriminante é ≥0, produzindo raízes reais (distintas ou repetidas).","

Resolva as seguintes EDOs determinando a solução geral e, quando houver condições iniciais do PVI, a solução particular.

(a) y'' + 2y' - 3y = 0

(b) 6y'' - y' - y = 0

(d) 9y'' + 6y' + y = 0

(e) y'' - 2y' + 6y = 0

(f) 4y'' + 9y = 0

(g) 6y'' - 5y' + y = 0; \\, y(0) = 4; \\, y'(0) = 0

(h) y'' + 4y' + 4y = 0; \\, y(-1) = 2; \\, y'(-1) = 1

(i) y'' + y = 0; \\, y\bigg(\\frac{\\pi}{3}\\bigg) = 2; \\, y'\\bigg(\\frac{\\pi}{3}\\bigg) = -4

(j) y'' - 2y' - 3y = 3e^{2t}

(k) y'' + 9y = t^2 e^{3t} + 6

(l) 2y'' + 3y' + y = t^2 + 3 \\sin(t)

(m) y'' + y' - 2y = 2t; \\, y(0) = 0; \\, y'(0) = 1

(n) y'' - 2y' + y = te^t + 4; \\, y(0) = 1; \\, y'(0) = 1

(o) y'' + 4y = 3 \\sin(2t); \\, y(0) = 2; \\, y'(0) = -1

",[228],{"_44":229,"_58":230,"_60":231,"_146":147,"_148":232,"_119":233,"_121":233,"_46":234,"_123":231},"6516bbbd-f2a3-4710-8382-702240b17836","Mecânica na Engenharia de Petróleo","mecanica-na-engenharia-de-petroleo","b787e438-0ab3-454c-ab43-5d3d14c2720d","2025-04-29T03:44:35.328997+00:00",{"_151":235,"_153":154,"_155":236},4,12302,{"_40":238,"_42":43,"_44":239,"_78":240,"_97":252,"_98":253,"_52":254},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[241,244,247,249],{"_44":242,"_82":83,"_84":243},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_44":245,"_82":87,"_84":246},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_44":238,"_82":91,"_84":248},"

Verdadeiro, falso, verdadeiro

",{"_44":250,"_82":95,"_84":251},"3c98539b-1af9-4d44-aecd-c266754a2075","

Falso, falso, falso

","85,5 % decomposto → 14,5 % restante.\nN/N0 = 0,145 ⇒ t = ln(1/0,145)/(ln2/5730) ≈ 1,6×10⁴ anos.\nItens prováveis: (1) resta 14,5 % do C-14 (V); (2) idade ≈ 1,2×10⁴ anos ou 3 meias-vidas (F); (3) t½ do C-14 = 5730 anos (V). Sequência: V-F-V, correspondendo à alternativa c.","

Qual é a idade da madeira na qual 85,5\\% do C-14 se decompos?

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a) ????3 de ????4????5
b) ????2 de ????2????????2
c) ????1 de 2????????1
d) ????1 de 2????2????",[278],{"_44":229,"_58":230,"_60":231,"_146":147,"_148":232,"_119":233,"_121":233,"_46":279,"_123":231},{"_151":235,"_153":154,"_155":236},[281,283,292,298,302,304,306,314,319,327,329,334,340],{"_44":229,"_58":230,"_60":231,"_146":147,"_148":232,"_119":233,"_121":233,"_46":282,"_123":231},{"_151":235,"_153":154,"_155":236},{"_44":284,"_58":285,"_60":286,"_146":147,"_148":287,"_119":163,"_121":163,"_46":288,"_123":291},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0",{"_151":289,"_153":154,"_155":290},5,30614,"engenharia-mecatronica-1",{"_44":293,"_58":59,"_60":61,"_146":147,"_148":294,"_119":295,"_121":295,"_46":296,"_123":297},"8850e507-a691-4d45-a7c7-16221e9c5af2","88fe96b3-2a17-4198-90d5-ddda3d6f5d45","2025-04-29T04:00:13.215003+00:00",{"_151":154,"_153":154,"_155":173},"resistencia-dos-materiais-6",{"_44":294,"_58":161,"_60":162,"_146":147,"_148":284,"_119":233,"_121":233,"_46":299,"_123":301},{"_151":289,"_153":154,"_155":300},25741,"mecanica-3",{"_44":143,"_58":144,"_60":145,"_146":147,"_148":-5,"_119":149,"_121":149,"_46":303,"_123":145},{"_151":152,"_153":154,"_155":156},{"_44":170,"_58":59,"_60":61,"_146":147,"_148":160,"_119":171,"_121":171,"_46":305,"_123":174},{"_151":154,"_153":154,"_155":173},{"_44":307,"_58":308,"_60":309,"_146":147,"_148":287,"_119":163,"_121":163,"_46":310,"_123":313},"b6e37f32-f8e5-4025-bf0f-69ffc00fb331","Engenharia Civil","engenharia-civil",{"_151":311,"_153":154,"_155":312},21,45865,"engenharia-civil-3",{"_44":232,"_58":315,"_60":316,"_146":147,"_148":287,"_119":163,"_121":163,"_46":317,"_123":318},"Engenharia de Petróleo","engenharia-de-petroleo",{"_151":289,"_153":154,"_155":236},"engenharia-de-petroleo-1",{"_44":320,"_58":321,"_60":322,"_146":147,"_148":307,"_119":323,"_121":323,"_46":324,"_123":326},"c5bf57d4-c3d8-4365-b53e-085fa14a3a95","Estruturas","estruturas","2025-04-29T03:44:32.303369+00:00",{"_151":289,"_153":154,"_155":325},8852,"estruturas-1",{"_44":160,"_58":161,"_60":162,"_146":147,"_148":143,"_119":163,"_121":163,"_46":328,"_123":167},{"_151":165,"_153":154,"_155":166},{"_44":330,"_58":59,"_60":61,"_146":147,"_148":229,"_119":331,"_121":331,"_46":332,"_123":333},"d1e4567b-f68a-49e1-b3e5-3888343d7871","2025-04-29T04:00:14.680867+00:00",{"_151":154,"_153":154,"_155":173},"resistencia-dos-materiais-7",{"_44":335,"_58":336,"_60":61,"_146":147,"_148":320,"_119":337,"_121":337,"_46":338,"_123":339},"da8d2ecf-e949-4afc-966f-98b4b367fac1","Resistencia dos Materiais","2025-04-29T04:00:06.9766+00:00",{"_151":154,"_153":154,"_155":173},"resistencia-dos-materiais-5",{"_44":287,"_58":341,"_60":342,"_146":147,"_148":-5,"_119":343,"_121":343,"_46":344,"_123":342},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_151":345,"_153":154,"_155":346},29,351586,"tagsTree",[349,358],{"_44":143,"_58":144,"_60":145,"_146":147,"_148":-5,"_119":149,"_121":149,"_46":350,"_123":145,"_157":351},{"_151":152,"_153":154,"_155":156},[352],{"_44":160,"_58":161,"_60":162,"_146":147,"_148":143,"_119":163,"_121":163,"_46":353,"_123":167,"_157":354},{"_151":165,"_153":154,"_155":166},[355],{"_44":170,"_58":59,"_60":61,"_146":147,"_148":160,"_119":171,"_121":171,"_46":356,"_123":174,"_157":357},{"_151":154,"_153":154,"_155":173},[],{"_44":287,"_58":341,"_60":342,"_146":147,"_148":-5,"_119":343,"_121":343,"_46":359,"_123":342,"_157":360},{"_151":345,"_153":154,"_155":346},[361,370,379],{"_44":284,"_58":285,"_60":286,"_146":147,"_148":287,"_119":163,"_121":163,"_46":362,"_123":291,"_157":363},{"_151":289,"_153":154,"_155":290},[364],{"_44":294,"_58":161,"_60":162,"_146":147,"_148":284,"_119":233,"_121":233,"_46":365,"_123":301,"_157":366},{"_151":289,"_153":154,"_155":300},[367],{"_44":293,"_58":59,"_60":61,"_146":147,"_148":294,"_119":295,"_121":295,"_46":368,"_123":297,"_157":369},{"_151":154,"_153":154,"_155":173},[],{"_44":307,"_58":308,"_60":309,"_146":147,"_148":287,"_119":163,"_121":163,"_46":371,"_123":313,"_157":372},{"_151":311,"_153":154,"_155":312},[373],{"_44":320,"_58":321,"_60":322,"_146":147,"_148":307,"_119":323,"_121":323,"_46":374,"_123":326,"_157":375},{"_151":289,"_153":154,"_155":325},[376],{"_44":335,"_58":336,"_60":61,"_146":147,"_148":320,"_119":337,"_121":337,"_46":377,"_123":339,"_157":378},{"_151":154,"_153":154,"_155":173},[],{"_44":232,"_58":315,"_60":316,"_146":147,"_148":287,"_119":163,"_121":163,"_46":380,"_123":318,"_157":381},{"_151":289,"_153":154,"_155":236},[382],{"_44":229,"_58":230,"_60":231,"_146":147,"_148":232,"_119":233,"_121":233,"_46":383,"_123":231,"_157":384},{"_151":235,"_153":154,"_155":236},[385],{"_44":330,"_58":59,"_60":61,"_146":147,"_148":229,"_119":331,"_121":331,"_46":386,"_123":333,"_157":387},{"_151":154,"_153":154,"_155":173},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários