módulo 02
TRANSCRIPT
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Trabalho:w;;.
www.fisicarildo.blogspot.com
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Quando uma Força transfere ou transforma energia.
.( . )
F dJoule Newton metro
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. .cosF d
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1 2A A
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Força Peso
Não depende da trajetória (caminho)
τ=F.d.cosθsobe:τ=-m.g.Hdesce:τ=+m.g.H
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Teorema da Energia Cinética
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PotênciaRapidez(velocidade) com que a Energia é transformada ou transferida
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el
EnergiaPotTempoJouleWattsegundo
QPott t t
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IMPULSOIMPULSO
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DEFINIÇÃODEFINIÇÃO
tFI .
F
t
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IMPULSO DE FORÇA VARIÁVELIMPULSO DE FORÇA VARIÁVELF
t
F
t
A
I ÁREA
UNIDADE:
(SI) – N.s
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QUANTIDADE DE MOVIMENTO (Q)QUANTIDADE DE MOVIMENTO (Q)Situação 1
h
Situação 2v = 20 km/h
v = 120 km/h
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CONCLUSÃOCONCLUSÃOSituação 1: Massas diferentes
Velocidades iguais
Situação 2: Massas iguais
Velocidades diferentes
MELANCIA
FUSCA 2
vmQ . Unidade (SI): kg.m/s
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TEOREMA DO IMPULSOTEOREMA DO IMPULSOvO v
ofF QQIR
Qf – quantidade de movimento final.
Qo – quantidade de movimento inicial.
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PRINCÍPIO DA CONSERVAÇÃO DA PRINCÍPIO DA CONSERVAÇÃO DA QUANTIDADE DE MOVIMENTOQUANTIDADE DE MOVIMENTO
F
F
ofF QQIR
of QQ 0
of QQ
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GRAVITAÇÃO UNIVERSAL
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Leis de Kepler Primeira lei(das Órbitas): As
órbitas são elipses com o Sol em um dos focos.
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Segunda lei (das Áreas)
O Raio Vetor varre áreas iguais em intervalos de tempo iguais.
constatnteareolaráreavt
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Terceira lei (dos Períodos):
2
3 constanteTR
3 2
3 2
( ) ( )( ) ( )
A A
B B
R TR T
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F = força gravitacional (N)
M, m = massas (kg)d = distância (m)G = (6, 7. 10)-11 N.m2 /kg2
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2
2
. ..
.( )
GP FG M mm gR
G Mgh r
Aceleração da Gravidade
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Hidrostática
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Pressão Exercida Pela Coluna de Um Líquido
A
m
P (Força Peso)
FA
P =
m . gA
P =μ .v . gμ.A.h .g
h
μ . g . hP =
Pressão No Fundo
Densidade do Líquido
Gravidade
Profundidade
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Pressão Atmosférica(O Experimento de Torricelli)
Mercúrio
120cmh= 76,0 cm
AB
PA=PATM
PBPAtm
=PAtm μHg . g . h
=PAtm 13,6 . 103 .10 .0,76
=PAtm 1,01 . 105 N/m2.
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Teorema de Stevin
B
PA
h
A
PB
PATM
PA PB_ = μ.g.hA
_ μ.g.hB
PA PB_ = μ.g ( hA – hB )
h
.h
PA PB_ = μ.g.h
PA PB= + μ.g.hPAtm
Pressão Absoluta Pressão
Atmosférica
Pressão Efetiva
PABS
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Vasos Comunicantes
1 2P1 P2
P2=P1
Óleo
Água
1 2
P2=P1
P1 P2h1
h2
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=P1 P2
=PÓleo PÁgua
= μ2 . g . h2μ1 . g . h1
= μ2 . h2μ1 . h1
h1 h2
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Prensa Hidráulica(Princípio De Pascal)
A1 A2
F1
F2
=P1 P2
F1
A1=
F2A2
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Empuxo (Teorema de Arquimedes)
E
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Empuxo
m
PLíquido
E
=E PLíq
=E mL. g
=E . gdL. VdL. VC
Densidade do líquido
Volume Imerso