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GAYA GESEKN
W
V
f
f = μN
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GAYA GESEK PD BIDANG MIRING
Disini N = mg cos
f = μN = μmg cos S arat !eatas
! - f- Wsin" = maS arat !e "a#a$
-! # f $ Wsin" = ma
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APLIKASI GAYA GESEK PD T%B%& MAN%SIA
%oefiien gesek ( ') antara tendon dan k&'it = *+(') persendian t&'ang ,ang digosok dengan min,ak = +
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GAYA PEGAS
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MOMEN TORKA ( τ )
τ = rF┴ τ = rFsinθ
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SISTEM PENG%MPIL
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SISTEM PENGUMPIL PADA TUBUH MANUSIA
τW = τW= r(mg)
τM= τM = r(mg)τW - τM= 0
τW = τM
τ W = τM
Sistem Pengumpil Kel s pe!t m
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τW = τW
τM = τMτW- τM= 0
τW= τM
τ W = τM
S stem Pe g*m+ , Ke,as Ket ga
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τW= τW
τM= τM
τW- τM= 0
τW= τM
τW = τM, Jika W = 50 N30 cmx50 N = 4 cmxM
M = 1500 Ncm/4 cm =375 N
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ae-a$ Me!a ! ( M)
%emamp&an &nt&k mengangkat beban
W = a,a Berat M = a,a tot
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KESETIMBANGAN
012324 56M78 212 =
69M728 M M:N 212 =
2
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;&sat raarak dari titik
ac&an
. 0ecara grafis
m * m
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Pe e t*a P*sat Gra0 tas Secara Matemat s
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Penentu n Pus t G! "it si Se# ! G! $is
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432%0? 7:8:3
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432%0? 7:8:3
432%0? 4972N
432%0? %97?4
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432%0? %:;272
432%0? %2%?
@
1
+A
+A
2
!
!*x = !* os +A! x = ! os +A
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Lat $a
Bera+a ga a 1t1t+a-a !a! -a,e ga !a massa1ra g 34 !g
( 5t = 46748 m)
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L ti% n &
Be! p G ' Ot t
M p * leng n
m ss +e+ n , -g
. / 01 1
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LATI&AN 8
-Berapa besar ga,a ,ang beker>a pada kaki-Berapa ga,a ,ang beker>a pada s&mb&-@-Berapa ga,a ,ang beker>a pada s&mb&-1-Berapa 3es&'tan ga,a
;erCatikan gambar diba aC 6ika W* = + NE W = +F N pan>ang 2D = G 2BE
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;erCatikan gambar diba aC. 6ika W* = + NE W = +F N pan>ang 2D = G 2BE 2: = */ 2B kem&dian tent&kan 5*.4orka W*
.4orka W+.4orka 4
H. a,a otot 4I.%omponen ga,a pada s&mb&-x dan s&mb&-,J.3es&'tan ga,a
a. Ga a +a-a t*,a g "e,a!a g 1ra g a g "er- r". D agram ga a 1t1t saat memega g "e"a
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Berapa besar ga,a 4 >ika B = * NE M = NE "t = + E"m = +
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;erCatikan gambar di ba aC kem&dian Cit&ng'aC 5 a. komponen ga,a pada s&mb&-x b. komponen ga,a pada s&mb&-, c. res&'tan ga,a
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