6
Mudah dan Aktif Belajar Fisika untuk Kelas X
4?4;E4FG=8AEA8D464474?4;A8D4640.E8C8DFC47437 474 A8D464 A C8A:GGD4A 4EE4 EG4FG 58A74 7?4G4A 78A:4A
8A::8E8DCBEE4A4F54A:4A7E8C4A=4A:?8A:4A;A::48A64C4 8E8F54A:4A E4?AK4 A74 8A54A: 5858D4C4 5G4; 8?8D8A:
A74C8DB?8;CBEEE8F54A:A8D46478A:4A8A::8E8D4A4F54A:4A ?8A:4ACG?G;4A:D48CBEE
:D474A?8A:4AE4FG4A:D47CBEE
:D4E8;A::47C8DB?8;4EE4AK4E858E4D:D4 c.
Alat Ukur Waktu
8=G?4;AEFDG8AC8A:GGD4AI4FG8D4CA74?;4F74?48 ;7GC4AE8;4D;4DE8C8DF=47A7A:=454A7G?74A.+24
F4A:4A8DGC44AAEFDG8AC8A:GGDI4FGK4A:C4?A:78A4??4F GGDACGA7:GA44A;4CD7E8?GDG;A8:4D44;4A4?4FGGD
I4FG54AK47C4E4A:C4748A74D44AF8?8CBAE8?G?8D74AC8D4A:4F 8?8FDBA4?4AAK4
394-4 747G4=8AE=4F4A:4A4F4G4D?B=E854:4AEFDG8AC8A:GGD
I4FGK4FG=4F4A:4A7:F4?74A=4F4A:4A=4DG474=4F4A:4A =4DG=4DGF8DC4A=4A:7E85GFE8BAK4A:58D:8D4E4FGE4?4F8DC8A78
E8F4CE4FGE8BA=4DGK4A:?85;C8A787E85GF=4DG8AFK4A: 58D:8D4E4FGE4?4E8F4C8AF74CGA=4DGF8DC8A787E85GF=4DG
=44DGA58D:8D4E4FGE4?4E8F4CE4FG=4474GGAK4=4 F4A:4A8?A?48F74C4EF4AE8BA
+28DGC44AAEFDG8AC8A:GGDI4FGK4A:8?A?4 8F8?F4A?85;FA::74DC474=4F4A:4A747G4=8AE.+2K4A:
54E4A74=GC4K4FG.+2=4DG74A.+27:F4?+2=4DG 8?A?48F74C4EF4AF8D?;4FC474E4?4K4FG
E8BAE874A:4A
EFBCI4F6;7:F4?74AF4D4AK48?A?48F74C4EF4A
E8BA +2 54AK4 7:GA44A 7 ?45BD4FBDG E4 GAFG C8A:
GGD4AI4FG58D54:4C8D6B544A8?4AFG74AF4D4AK4?4D=4D4C8A78 8DGC44A4FHF4EB?4;D4:4K4A:C4?A:E8DA:8A::GA44A.+2
d. Alat Ukur Kuat Arus Listrik
747G44644?4FGGDG4F4DGE?EFD74?4EG4FGD4A:44A?EFD K4FG4C8D88F8D4A4?B:74A4C8D88F8D7:F4?4D87G44?4FGGDA
4C8D88F8D4A4?B:8DGC44AAEFDG8AK4A:C4?A:54AK47:GA44A 8F4A748?4G4AC8A:GGD4A4DGE?EFD74?4EG4FGD4A:44A
EG58D4DGE?EFD;4DGE7;G5GA:4AE864D4E8D78A:4A4C8D88F8DF8DE85GF GA44A?4;54F4EGGDK4A:E8EG44F4G?85;FA::854:46BAFB;GAFG
8A:GGDG4F4DGE?EFD
7:GA44A54F4EGGD4EGK4A:?85; 58E4D74D
4D485464E4?44C8D88F8D474?4;E854:458DGF
4E?C8A:GGD4AE4?4F8D5464 E4?44EGT54F4EGGD
Gambar 1.8
Stopwatch
Sumber: Science in Focus Physics, 2002
Sumber:
Science in Focus Physics, 2002
Gambar 1.9
Amperemeter
A748A:GGDG4F4DGE74?4E85G4;D4A:44A78A:4A4C8D88F8D;4E? C8A:GGD4A7C8DB?8;74F4E8C8DFC474:454D+8AFG4A;4E?C8A:GGD4AF8DE85GF
4?4F8D5464 4?44EG
Contoh
1.1
Gambar 1.6
Neraca Ohaus merupakan salah satu instrumen pengukuran massa.
Gambar 1.7
Jam tangan jarum
Sumber:
Tempo, 2002
Sumber: Phywe.
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7
Pengukuran dan Besaran
3
3 3 5 4F4G
3 3 3 3
3
20 40
60 80
100
4F4E4EG 4E?C8A:GGD4A
T 47;4E?C8A:GGD4AAK47?4CBD4AE854:458DGF
8F74C4EF4AC8A:GGD4AG4F4DGE?EFD
E4FG 78E4?
8DE8AF4E88F74C4EF4AD8?4F9 T
10 m A 50 m A
100 m A OFF
20 m A
4D?4;A9BD4E8A:8A4GGD4AGA74E8C8DF4EE4AK4748F8DAK474A =4D4AK474D4F4;4D8G74A64D?4;A9BD4E54:44A4A?4A?4F8DE85GF7
C8DB?8;+G:4EA7GCG?4A8C474:GDGA74E8F8?4;E8?8E48C8?4=4D545A
Mari Mencari Tahu
3. Ketidakpastian Pengukuran Berulang
,AFG8C8DB?8;A?458E4D4AK4A:4GD4F7?4G4A5858D4C4 4?C8A:GGD4A4F4GC8A:GGD4A58DG?4A:84A54AK474F4K4A:
7C8DB?8; A?4 8F74C4EF4A E84A 86? 4 A74 8?4G4A C8A:GGD4AEG4FG58E4D4AE854AK44?74A7C8DB?8;E4C8?3
3 3
3
A
A?4D4F4D4F4 x E4C8?E864D44F84FE7FG?E Q
Q 4?4 8EC8D8A E4 F8D74C4F 7G4 =8AE EC4A:4A 78H4E
EF4A74DK4FG78H4EEF4A74DGAFGC8A:GGD4AFGA::4? 74A78H4E EF4A74DGAFGC8A:GGD4A58DG?4A:474C8A:GGD4AFGA::4?EC4A:4A
474?4;A?48F74C4EF4A4?4FGGDAK4E874A:4AC474C8A:GGD4A 58DG?4A:E8F4C74F47GGD58D4?4?74A745?D4F4D4F4AK48H4E
EF4A74DGAFGC8A:GGD4A58DG?4A:474?4;E854:458DGF 3 6 3
6 8H4EEF4A74DGAFGC8A:GGD4A58DG?4A:74C4F=G:47FG?E4A
E854:458DGF
3
3 6 3 6
4F4G
3
3 6 3
6
864D4EF4FEF?4CBD4A;4E?8EC8D8A74C4F7FG?E4A8A=47 Q
Hasil akhir perhitungan hendaklah mencantumkan angka sesuai
jumlah angka yang seharusnya, yakni angka pasti terkecil di antara
angka yang dioperasikan.
Ingatlah
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