46
Mudah dan Aktif Belajar Fisika untuk Kelas X
A. Gerak, Jarak, dan Perpindahan
3A79203?8:2?7BABA3;A93A3;A:703??A72 ;3:9B93?7263;7978B553?9032032ABB63D
33?A7790B?B533293?3A723DAA3?05;3?B903 03?1=A=653?92:;93672B36?76?727BAB032279A
903?53?9879032A3?30BA;35:;73?B06932B2B9A3? 621BA3?A3AB7:F30B63DA325A3?05;3755:9
:22;BB3DA2A2782793057A7A791B 79 :2 278279 3057 1B 3DA 279A9 A3:6
03?53?9A3?62:29?3932B2B93DAA3?62:2 3A7D9AB3::B03?B06F7AB3;978B62?7:29
A3A78793DA2782791BA3?627:=AF5;353;B27 9F7:=A279A9A72903?53?99?3932B2B97:=AA3?62
3DAF52793;B2793A7D9ABA72903?B067A79A7A79F5 27::B73DA2730BA:7A7A3DA3?75A3?:76A2?7
F527A755:9F 27879BAB03203?B06932B2B9F2:;3:5D9AB
A3?A3ABA3?62A7A791B032A3?30BA279A932503?53?9 BAB0322730BA03?53?9:B?B879:7AF03?B5?7:B?B :;B
F5;3;3:8?753?9A;3;3?6A793F300F2730BA973;A79 3259 7:;B F5 ;3;3:8?7 53?9 235 ;3;3?6A79 AB
;3:70A95F30573F30003203?7262730BA27;79 ?92:685:7AF527A3;B6=:36BAB0322:;
3:5D9ABA3?A3AB:;7:;B7798?9285:7A ;3;7:797353?A7F5;85:7A28?9932BF
;3?B903?9:?F7AB03?F56F;3;7:79703?8 30571=A=6203?59A2?7?B;69339=:62:7A
F5;8?9F527A3;B62?7?B;69339=:693A792 03?59A2:6;2358?9F527A3;B62?739=:693?B;6
93A792B:5:369?38?9A729;3;7:797?68?93::B 03?7:7=7A74:;6:778?9A3?;B903?9:?
3?726 2:6 3?B06 932B2B9 BAB 032 3A3:6 03?53?93:;3:5D9ABA3?A3AB3?726;3?B903?
C39A=?367553:7;3;7:79703?8B5;3;7:797?6:369?3 7AB3?7262A03?6?5=7A74AB35A74
1. Perpindahan Sepanjang Sumbu-x
2
3=?53532?33203?53?9385 B;0B=7A74235=77D:27A7A79A7A79L
;3A3:6;7
27A7A79
;3532?3327AB03?63A7
Gambar 3.1
Pesawat bergerak terhadap landasan. Dapatkah pesawat
tersebut dikatakan diam?
Sumber:
www.portalbrasil.com
-+--+++-,--,
Tes Kompetensi Awal
963?032A?8?923?726 F527;9B22359313A
F527;9B223593:8B F5293A6B7A3A553?9:B?B03?AB?
253?9:B?B03?B0603?AB? 792;38AB6930B60=:23:3;0?93?A
2?793A7557F5;31?03?;2 ;350795339B2?932B0329A70
27A631?03?;;3AB8B962235 3?FAA3?30BA3;B99:F
Di unduh dari : Bukupaket.com
47
Gerak Lurus
Gambar 3.3
Perpindahan sepanjang sumbu-x negatif.
Contoh
3.1
3?6A795;0?27;75 33=?503?8:2?7A7A79;3B8BA7A79
3;B27793;0:793A3;A3;B:F7ABA7A79 3AB9:6
8?9F527A3;B6=?57AB 0 3?726
=?5A3?30BA
Perpindahan merupakan besaran vektor, dan jarak merupakan besaran
skalar.
Ingatlah
Gambar 3.2
Perpindahan sepanjang sumbu-x positif.
2 4
6 8
10 12
14 16
18 20
A m
B
arah gerak
=77D:27A7A792A7A79 L
;2=77967?27A7A792
A7A79 ;3?726 2?7A7A7993;3:3DA7A7A792:6
L ;LL
;;
A279A906D3532?332A3:603?7262?7A7A79 93A7A7993938B6;?9F527A3;B63322?7
A7A7993A7A792:6; 3?726385B;0B35A743::B;3;7:797?69397?7
33?A727AB8B992
=77D:33227A7A79A7A79
;93;B27;3:B1B?203? 63A727A7A79A7A79L
;3?726 2?7A7A7993A7A79235
;3:3DA7A7A792:6 L
L
;L
;L; A279A906D3532?332A3:603?7262?7A7A79
93A7A799397?738B6;?9F527A3;B63322?7A7A79 93A7A792:6;
?7383:A3?30BA2A277;B:96:6:305703?79BA ?9;3?B985:7A53?930B6032F5A729
;3;7:797?623::B03?A2=7A74 0 3?7266F27A3AB9=:36932B2B9D:2932B2B9
967?032 1 3?7262A03?A2AB35A74L03?5AB52
?63?7267AB
Sebutkan peristiwa-peristiwa di sekitar Anda yang melibatkan
konsep perpindahan dan jarak.
Tantangan
untuk Anda
A C
bergerak ke arah x
negatif kedudukan awal
kedudukan akhir
B
posisi awal x
1
posisi akhir x
2
–4 –3
–2 –1
1 2
3 4
A C
posisi awal x
1
posisi akhir x
2
kedudukan awal kedudukan akhir
B
bergerak ke arah x
positif
–4 –3
–2 –1
1 2
3 4
Di unduh dari : Bukupaket.com
48
Mudah dan Aktif Belajar Fisika untuk Kelas X
30B60=:A372?7932B2B9D:27A7A79;3553:7275385:7A 675593A7A79F503?8?9;93;B278AB62?793A7557;;727A7A79
203?63A733?A725;0?03?79BA 3AB9:6
8?9F527A3;B60=: 0 03?3?7260=:
Tes Kompetensi Subbab
A
--, 3:93?032A?8?923?726
;A=?57D03?8:27:7A33?A72 5;0?03?79BA
5390=:03?B9B?85
;2 :30? ;303:B;03?;70=:B::7;3:9B9
3; 235 03?:?7 ;357A?7 :5 30F9BA?7AB58?923?726
F5A3:627A3;B6F 339=?9A9;B:;B:03?229==?27AL
;
93;B27;3:=;A6755=77F;3;7:7979==?27A ;3AB98?923?7269A9
A3?30BA
B. Kelajuan dan Kecepatan
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