Page 147 - PRAKTIS BELAJAR FISIKA SMA KELAS XII

!2$/ (1*7$5$$1 + )!

&2+","/-") %* %"-". #5,5 -"4*)"/ /%"
BEC =:CDB:< H2?8 5:<6=E2B<2? CE>36B D682?82? E2 3E29 <2A2C:D@B 52?

>6>6?E9: A6BC2>22? C:? + 56?82? 52=2> 5:B2?8<2: C6B: 52? 5:9E3E?8<2? 56?82? CE>36B
2>A6B6 52? + 52=2> C6<@? <6D:<2 5:9E3E?8<2? D682?82? / B25 C -6?DE<2? 2BEC 676<D:7
56?82? C63E29 :?5E<D@B 56?82? :?5E<C: ! H2?8 >6?82=:B A252 B2?8<2:2?
-6?DE<2?
2 B62<D2?C: :?5E<D:7 52B: :?5E<D@B 52?
3 D682?82? 676<D:7 A252 :?5E<D@B

$1*.$,$1 !(4,

2=2> AB2<D:<?H2 B6C:CD@B :?5E<D@B 52? <2A2C:D@B 52A2D
5:B2?8<2: C6B: A2B2=6= 2D2E 823E?82? <65E2?H2 <2? D6D2A: A6>3292C2?
5: C:?: 2<2? 5:7@<EC<2? A252 B2?8<2:2? C6B: ".#"2
>6>A6B=:92D<2? B2?8<2:2? C6B: 52? 5:9E3E?8<2? 56?82? CE>36B
D682?82?

$0%$4
%*704*2*7 ;.:2

BEC =:CDB:< A252 C6D:2A <@>A@?6? 252=29 C2>2 (=69 <2B6?2

:DE 2?882A=29 2BEC =:CDB:< A252 B2?8<2:2? >6>6?E9: A6BC2>22?
I I sin t N
m
,642B2 E>E> D682?82??H2 5:?H2D2<2? @=69

V sin( t V ) N
m
&:C2=?H2 D682?82? A252 C6D:2A <@>A@?6? 252=29 52?

36BDEBED DEBED E?DE< D682?82? A252 B6C:CD@B :?5E<D@B 52? <2A2C:D@B
C652?8<2? D682?82? CE>36B?H2 6B3652 56?82? B2?8<2:2? 2BEC C62B29
A252 B2?8<2:2? C6B: D:52< 36B=2<E A6?;E>=292? D682?82? C6A6BD: 3:2C2
2D2E .?DE< >6?82?2=:C:C B2?8<2:2? 5:8E?2<2?

32?DE2? 72C@B
7%71*$1 $16$4$ '$1

E?2<2?=29 5:28B2> 72C@B E?DE< >6?EBE?<2? 9E3E?82? 2?D2B2
D682?82? CE>36B 52? D682?82? A252 C6D:2A <@>A@?6? 52=2> B2?8<2:2?
2B: A6>3292C2? C636=E>?H2 5:<6D29E: 329G2
2 A252 B6C:CD@B 2BEC 52? D682?82? C672C6 >2<2 72C@B 52? 36B:>A:D

3 A252 :?5E<D@B 2BEC D6BD:?882= @=69 D682?82? 2D2E D682?82? >6?529E=E:
1
2BEC 56?82? 3652 72C6 B25 >2<2 72C@B 52? C2=:?8 D682< =EBEC
2
4 A252 <2A2C:D@B 2BEC >6?529E=E: D682?82? 2D2E D682?82? D6BD:?882= @=69
1
2BEC 56?82? 3652 72C6 B25 >2<2 72C@B 52? C2=:?8 D682< =EBEC
2

$:*4<2; .5*3*: 2;24* =7<=4 .5*; )