Page 49 - MUDAH DAN AKTIF BELAJAR FISIKA SMA KELAS X

C %/;2+=35+8 +! / +.+6+2 <>.>= +:3= B+81 =/;6/=+5 .3
+8=+;+ ?/5=9; .+8 ?/5=9; </.+815+8 ?/5=9; .+8 ?/5=9; =/;6/=+5
:+.+ <+=> ,3.+81 %/;5+63+8 <36+81 F +.+6+2
F
<38
;+2 ?/5=9; +.+6+2 </<>+3 ./81+8 +=>;+8 =+81+8 5+8+8 .3 7+8+
O B >4>81 ?/5=9; 7/8>4> >4>81 ?/5=9; </+;+2 ./81+8 63:+=+8 5//7:+=
4+;3 5/=35+ +;+2 4/7:96 7/8>84>55+8 +;+2 F
A %+.+ :/;5+63+8 <36+81 ?/5=9; =3.+5 ,/;6+5> <30+= 597>=+=30 </23811+
F F 5+8 =/=+:3 ,/;6+5> <30+= +8=3 597>=+=30 B+3=>
F E F )8=>5 7/8/8=>5+8 836+3 ;/<>6=+8 ?/5=9; .+8
Gambar 2.14
Perkalian silang vektor A :/;<+7++8 :/;5+63+8 ?/5=9; .+:+= .31>8+5+8 <30+= <30+= :/;5+63+8 <36+81
dan vektor B. </<+7+ <+=>+8 +8=+;+ 6+38
:/;5+63+8 <36+81 +8=+;+ .>+ ?/5=9; <+=>+8 B+81 <+7+ ,/<+; .+8 </+;+2
,/;836+3 896
:/;5+63+8 +8=+;+ .>+ ?/5=9; <+=>+8 B+81 ,/;,/.+ +5+8 ,/;836+3 :9<3=30
435+ </+;+2 4+;>7 4+7 </,+6358B+ +5+8 ,/;836+3 8/1+=30 435+ +;+28B+
Ingatlah ,/;6+@+8+8 ./81+8 +;+2 4+;>7 4+7

Untuk menyatakan nilai suatu k
besaran vektor, selain dapat
ditandai dengan cetak miring,
dapat juga dituliskan dengan tanda j ' F ' ' F ( ) ( F ' E)
mutlak i ( F ( ( F ) ' ' F ) E(
) F ) ) F ' ( ) F ( E'
8.+ .+:+= 7/811>8+5+8 <30+= :/;5+63+8 <36+81 >8=>5 7/8/8=>5+8

,/<+; :/;5+63+8 <36+81 </<+7+ ?/5=9; <+=>+8 7/6+6>3 <>.>= 0 180
35+ 5/.>+ ?/5=9; <+6381 =/1+5 6>;>< 7+5+ C ' F ( )
35+ 5/.>+ ?/5=9; <+7+ .+8 </1+;3< 7+5+ ' F '

Contoh 2.8
35/=+2>3 ?/5=9; ! .+8 " </:/;=3 :+.+ 1+7,+; ,/;35>=
/<+; ?/5=9; ?/5=9; =/;</,>= 7+<381 7+<381 .+8
<+=>+8 (/8=>5+86+2
+ ! - ! " / F " c b
, " . F ! 0 ! F "

4 !
+ ! -9< a

, " -9< C E E-9< E E

- ! " -9< C E E-9< E E

. F ! <38

/ F " <38

0 ! F " <38

40 Mudah dan Aktif Belajar Fisika untuk Kelas X