fsk sap 1.ppt
TRANSCRIPT
7/21/2019 FSK SAP 1.ppt
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BIOMEKANIKA
Satuan adalah besaran fisis yang menyatakan
kuantitas suatu materi.
Dua sistem umum satuan:
1.Sistem internasional (SI)
2.Sistem imperial
Sistem internasional dibagi atas 2 adalah
1.Sistem MKS
2.Sistem !S
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Besaran "#$#$
Besaran Satuan SI*an+an ,eter (,)
Massa Ki%ira, ($)
-a$tu .eti$ (s)
Arus A,"ere (A)
Te,"eratur Ke%/in (K)u,%a& at M#% (,#%)
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#nt#& 'esaran turunan
Besaran Satuan
Ke3e"atan ,4s
*er3e"atan ,4s2
Gaya Ne5t#n
Eneri #u%%e
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Ada tia ti"e "enu$uran
1!*enu$uran $ua%itati6 ada%a&
! .idasar$an "ada tandatanda /isua% ! Tida$ ,e,a$ai an$a
! Terantun "eni%aian #'ser/er
! Su'ye$ti62! *enu$uran se,i $ua%itati6
! In6#r,asi yan ter3atat s$a%a re%ati6
! Adanya "er$iraan nu,eri$ suatu &asi% ! #nt#& s$#r 7 "ada s$a%a nyeri
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8! *enu$uran $uantitati6 ! Menuna$an an$a
! Ada a%at u$ur4instru,en
! Ada satuan "enu$uran
! Si6atnya #'+e$ti6
! Tini 'adan9 te$anan dara&9 d%%
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Hu$u, Ne5t#n tentan era$
1!Hu$u, Ne5t#n I
Benda a$an teta" dia, atau 'erera$%urus 'eraturan a"a'i%a tida$ ada aya%uar yan 'e$er+a "ada 'enda terse'ut!
se3ara ,ate,atis ditu%is :;<0
;<aya yan 'e$er+a
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2! Hu$u, Ne5t#n II
*er3e"atan suatu 'enda'er'andin %urus dan seara&denan aya yan 'e$er+a "ada'enda terse'ut!
Besarnya ada%a&
t mam F
∆
∨∆== .
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8!Hu$u, Ne5t#n III
i$a 'enda "erta,a ,ener+a$anaya "ada 'enda $edua9 'enda$edua a$an ,ener+a$an aya yansa,a "ada 'enda "erta,a teta"iara&nya 'er%a5anan!
Se3ara ,ate,atis ditu%is
reaksiaksi F F −
=
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Keteranan
;< aya (Ne5t#n),< ,assa 'enda ($)
a< "er3e"atan 'enda (,4s2)
=/<//#<"eru'a&an $e3e"atan
=t<"eru'a&an 5a$tu (s)
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Kasus
*era5at ,end#r#n r#stur denan
$e3e"atan a5a% 1 ,4s9 aar sete%a& > s$e,udian %a+unya ,en+adi > ,4s! Bera"a'esar aya d#r#n "era5at ter&ada"r#stur +i$a ,assa r#stur 1? $!
Solusi
ΔV=V-Vo=4-1=3 m/s, Δt=4 s,
m=18 kg N t
m F "#1$%
$.1& ==
∆
∨∆=
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Gaya ra/itasi ada%a&
Gaya tari$ 'u,i ter&ada" suatu'enda!
Massa ada%a&
u$uran +u,%a& ,ateri da%a, suatu'enda!
Berat ada%a& aya yan di,i%i$i suatu
'enda a$i'at ra/itasi 'u,i!
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Besar aya 'erat
Keteranan
5<aya 'erat (Ne5t#n),<,assa 'enda
<"er3e"atan ra/itasi (@9? ,4s2)
g mw .=
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Ta'e%! e6e$ ra/itasi
Apli!asi "ala#
!epera$atan
Pen%elasan
B#t#% in6us I &arus
ditini$an
Gaya ra/itasi ,e,un$in$an a%iran %arutan
.rainase 3airan .i%eta$$an %e'i& renda& dari tu'u& "asien
($ant#n urin "ada $ateterisasi)Menurani
"endara&an /ena
denan ,enini$an
$a$i
antun ,e,#,"a dara& $e atas ,e%a5an
ra/itasi se&ina su"%ai dara& ,enurun!
Mene,'a%i$ansir$u%asi dara& "asien
yan "insan
Barin$an "asien datar dan ,enini$an$a$i a$an ,e,'antu a%iran dara& $e #ta$
yan $e$uranan #$sien!
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Be'era"a $eadaan da%a, "era5atan "asien yan ,e,er%u$an "e,a&a,an ,enenai"entinnya "#sisi "usat ra/itasi9 se"erti
1!*#stur tu'u& yan 'ai$ saat ,enan$at'enda!
2!Me,asti$an sta'i%itas untu$ "asien yantida$ sta'i%
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Gaya ese$ ada%a& aya yan ti,'u% $arena$e$asaran 'idan ese$ yan ara&nya
'er%a5anan denan "erera$an 'enda!Besar aya ese$
Keteranan
6<aya ese$
$<$#e6isien ese$ $inetis
;<aya d#r#n atau aya tari$
N f k g
⋅= µ
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Ga,'ar y N ; ; y<;sin C
C6 D ;D<; #s C
5
Gaya "ada su,'u y
N; y5<0
Gaya "ada su,'u D
;D6<,!a
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#nt#&
Besar aya tari$ "era5at ter&ada"
r#stur ada%a& >0 N9 ara&nya se"erti"ada 'r di atas9 C<80#! Bi%a 'eratr#stur 100 N! Tentu$an 'esar aya ese$dan aya n#r,a% ( $<092) dan "er3e"atan
'enda!a5a'
Gaya "ada ara& y
N; sin C <5N <100>0 sin 80#
<100(>0!097)
<?0 Ne5t#n
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Besar aya ese$
;(< $ N <092! ?0
<1F Ne5t#n!
*er3e"atan ;D6(<,!a
>0 3#s 801F<10!a
( ) 2'%$"%
1($2)
sma
a
−=
−=
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#nt#&
Se#ran "asien ana$ sedan ,en+a%ani tra$si$u%it di,ana u+unu+un ta%i yan terantun"ada $atr#% sa%in dii$at$an "ada $u%it 'etis$a$i "asien dan "e,'erat! Ku%it "ada $a$i di
atas "a"an ,esin tra$si ditari$ ,e%a%ui $atr#%#%e& "e,'erat denan ara& /erti$a% $e'a5a&! Massa 'etis $a$i 2 $ dan ,assa"e,'erat 8 $ (<10,4s2)! K#e6isien $inetis
'adan denan "a"an 097 ese$an $atr#% dan,assa ta%i dia'ai$an9 &itun%a&
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Ga,'ar N
T 6
5$
5'
6
-
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.i$
,$<2 $
,'<8 $ $<097
Ara& D 5'6<(,$,')!a
80097!20<7!aa<> ,4s2
-'T<,'!a
80T< 8!>T<1? Ne5t#n
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Men&indari u%$us de$u'itusMen+aa "asien teta" 'erera$ untu$
,enu'a& titi$ $#nta$ "asien dan te,"attidur!i$a "asien i,#'i%itas una$an 'anta%9,atras9 te,"at tidur $&usus yan da"at,enurani te$anan!
;#r,u%asi te$anan
A
F
P =
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ara untu$ ,enurani aya ese$*enunaan r#daLu'ri$asi ("e%u,asan) ,isa%nya
! .a%a, tu'u&9 %endir ("aru9 +antun danusus) dan sa%i/a (untu$ "en3ernaan
,a$anan)!! airan sin#/ia% antara tu%an ra5an
"ada sendi sin#/ia%!
! *enunaan K +e%%y saat ,e,asu$ansuatu a%at dan $ateter $e da%a,tu'u&!
! L#si#n dan ,inya$ "i+at "ada $u%it!
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Keteranan
*<te$anan (N4,2
);<aya (N)
A<%uas 'idan te$an (,2)
#nt#&*er'andinan 'erat 'adan "asien A dan Bada%a& 28! Luas "er,u$aan tu'u& yan,eru"a$an titi$ $#nta$ denan te,"at tidur
"asien A ada%a& 2 $a%i "asien B! Tentu$an"asien ,ana yan u%$us de$u'itusnya "ara&!
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a5a'
5A 5B <28
AA <2AB
an "ara& ada%a& "asien B9 *B<8*A
A
F P =
$
1
2$
2===
B
B
B
B
A
A
B
A
A
A
F
A
A
F
P
P
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Siste, "enu,"i% ada%a& siste, yan,e,'eri$an $esei,'anan "ada suatu
'enda!Tu'u& ,anusia 'e$er+a siste, "enu,"i%se"erti tanan9 $a$i dan $e"a%a!
Ga,'ar
Titi$ tu,"u
52 51
r2 r1
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8 ,a3a, siste, "enu,"i% y 'e$er+a "ada tu'u&,anusia
1!Ke%as "erta,a siste, "enu,"i% Titi$ tu,"uan ter%eta$ di antara aya'erat dan aya #t#t! #nt#& #t#t dan tu%an "ada'aian $e"a%a!
M
5
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Keteranan
M< aya #t#t5< aya 'erat
#< titi$ yu,"uan
Keuntunan ,e$ani$
"er'andinan antara aya #t#t (M)denan aya 'erat (5)!
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Besar $euntunan ,e$ani$
r5 rM
5 M
w
M KM =
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