01a Kinematika Grafik - Visualisasi Gerak
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Transcript of 01a Kinematika Grafik - Visualisasi Gerak
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FISIKA I(QUALITATIF) KINEMATIKA :DESKRIPSI GERAK DENGAN GRAFIK
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VISUALISASI GERAK KINEMATIKA: GRAFIK
Perhatikan gerak benda yang berlangsung secara konstan; jarak
yang ditempuh tiap perubahan posisi sebanding dengan interval
waktu tertentu yang sama (Gbr. atas). Posisi perubahan bendauntuk tiap waktunya bila diilustrasikan dapat dilihat pada Gambar
kanan,
http:whs.wsd.wednet.edu!acultybussemathhomepagebusseclassesapphysicsstudyguides"PPhysics#$%#&hapter%'#$%#&hapter%'#$%#.html
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PENYAJIAN GERAK DENGAN GRAFIK
http:whs.wsd.wednet.edu!acultybussemathhomepagebusseclassesapphysicsstudyguideschapter#chapter#studyguide#$$.html
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http:demo.webassign.netebookscjdemopcc$#readmainc$#*#'+'re!.htm
PENYAJIAN GERAK DENGANGRAFIK waktu posisiGRAFIK waktu kecepatan
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ANALISA GERAK BERDASAR GRAFIK* (REVIEW: ERSA!AAN "!"! GARIS L"R"S#
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Kecepatan tetap
he straight line indicates
constant velocity
he slope o! the line !or a
displacement vs time graph
is the value o! the averagevelocity
tvx =
t
x
t
x
v =
=
graphtimevs.ofslope
velocity
x
t
xv
=
=
=
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Graf osisi ($# Waktu (t#
he position-time graph shows
the motion o! the particle (car)
he smooth curve is a guess
as to what happened between
the data points
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Ana%isis Kua%itati& Ge'ak paa G'a)k t $
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Percepatan
If the acceleration is
constant, the velocitychanges linearly:
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Gera !en"an Percepatan tetap
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Ana%isis Kua%itati& Ge'ak paa G'a)k t
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Interpreta#$ Graf: Ge'ak en-an pe'cepatantetap
.x t#/! the time doubles what
happens to the position0
Position as a function of time:
Velocity as a function of position:
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In#tantane% Ve'%c$
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Analisis Kualitatif Gerak yang lintasannya bukan garis lurus
he slope o! the curve is the velocity he curved line indicates the velocity is
changing here!ore, there is an acceleration
he general e1uation !or instantaneous
velocity is
0limx
t
x dxv
t dt
= =
I t t V l it d
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Instantaneous Velocity and
Speed
he instantaneous velocity o! an object can be obtainedby taking the slope o! a graph o! the position componentvs. time at the point associated with that moment in time
he instantaneous velocity can be obtained by taking aderivative with respect to time o! the object2s position.
Instantaneous speed, which is typically called simply
speed, is just the magnitude o! the instantaneousvelocity vector,
0limtx dx dx
v it dt dt
= = =
#'
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2
20lim x x
xt
v dv d xa
t dt dt
= = =
he instantaneous acceleration is
the limit o! the averageacceleration as tapproaches $
3isplacement e1uals the
area under the velocity 4
time curve
he limit o! the sum is a
de!inite integral
0lim ( )
f
in
t
xn n xtt
n
v t v t dt
=
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http:hyperphysics.phy-astr.gsu.eduhbasemechanicsmotgraph.html
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/,e 0oat t'ae%s in a st'ai-,t %ine wit, t,eacce%e'ation esc'i0e 01 a2s -'ap,3 I& itsta'ts &'o4 'est5 const'uct a 2s -'ap, an
ete'4ine t,e 0oat6s 4a$i4u4 spee3W,at istance s6 oes it t'ae% 0e&o'e itstops7
http:www.chegg.comhomework-help1uestions-and-answersboat-travels-straight-line-acceleration-described-s-graph-starts-rest-construct-v-s-graph--1%5#66
I& t,e ca' passes point A wit, a spee o& 894s an 0e-ins to inc'ease its spee at aconstant 'ate o& at; 93< 4s85 ete'4ine
t,e4 a-nitue o& t,e ca'6s acce%e'ationw,en s ; =99 43