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5E2 36?52 H2?8 36BC6?DE92? 32?H2< 5:;E>A2: 52=2> <69:5EA2? C692B: 92B:
*252 3636B2A2 <2CEC 82H2 86C6<2? 36BC:72D >6BE8:<2? C652?8<2? A252
<2CEC H2?8 =2:? 82H2 86C6<2? 36BC:72D >6?8E?DE?8<2? ,6@B2?8 C:CG2 >6
?6?52?8 C63E29 3@=2 5: 2D2C =2A2?82? 36BE>AED D6B;25: 82H2 86C6<2? 2?D2B2
A6B>E<22? 3@=2 56?82? 92>A2B2? BE>AED C69:?882 3@=2 2<2? 36B96?D:
A252 ;2B2< H2?8 D:52< D6B=2=E ;2E9 !2H2 86C6<2? >6?892>32D =2;E 3@=2
*252 4@?D@9 =2:? 82H2 86C6<2? D:>3E= 2?D2B2 32? <6?52B22? H2?8
C652?8 36B86B2< 56?82? ;2=2? H2?8 5:=2=E:?H2 C69:?882 D:52< C=:A !2H2
86C6<2? E52B2 56?82? C6@B2?8 A6?6B;E? A2HE?8 D6B;25: C6A2?;2?8
86B2<2??H2 >3EC2? E52B2 H2?8 >6?H6?DE9 3:52?8 A2HE?8 >6BEA2<2? Sumber: Physics for You, 2001
82H2 A6?892>32D D6B9252A =2;E A6?6B;E? C69:?882 A6?6B;E? C6=2>2D C22D
D:32 5: D2?29 *252 A6B:CD:G2 :?: 82H2 86C6<2? C2?82D 36B>2?722D D6B9252A Gambar 5.6
Gerak turun penerjun payung
<6C6=2>2D2? A6?6B;E? A2HE?8 semakin lambat ketika semakin
dekat dengan tanah.
6. Gaya Sentripetal (F sp)
-6=29 ?52 <6D29E: 329G2 <646A2D2? 252=29 36C2B2? F6<D@B H2?8
>6>:=:<: 36C2B 52? 2B29 $:<2 2B29 52? <6=2;E2? 36BE329 F6<D@B <646A2D2?
2<2? 36BE329 ;E82 *6BE3292? F6<D@B <646A2D2? 2<2? >6?:>3E=<2?
A6B46A2D2? '6?EBED "E<E> ## (6GD@? 82H2 >6BEA2<2? A6B<2=:2? 2?D2B2
>2CC2 36?52 56?82? A6B46A2D2? H2?8 5:>:=:<: 36?52 D6BC63ED $:<2 82H2
C6?DB:A6D2= H2?8 36<6B;2 A252 36?52 36B86B2< >6=:?8<2B 36B2DEB2? 252=29
A6B46A2D2? C6?DB:A6D2= H2?8 5:>:=:<: 36?52 36B>2CC2 # 252=29 >2<2
(&
(&
82H2 C6?DB:A6D2= 5:BE>EC<2? C63282: 36B:<ED
#
(& (&
+ 2
# # 2 N
(&

!2H2 C6?DB:A6D2= 2B29?H2 C6=2=E >6?E;E <6 D:D:< AEC2D =:?8<2B2? 52?
D682< =EBEC 56?82? F6<D@B <646A2D2??H2 .?DE< >6?86D29E: 252?H2 82H2
C6?DB:A6D2= A252 86B2< >6=:?8<2B 36B2DEB2? =2<E<2? <68:2D2? 36B:<ED

Aktivitas Fisika 5.4

Gaya Sentripetal
Tujuan Percobaan
Mengetahui arah gaya sentripetal
Alat-Alat Percobaan
Tali dan bola pingpong
Langkah-Langkah Percobaan
1. Ikatkan ujung tali pada bola pingpong.
2. Putar bola tersebut di atas kepala dengan posisi mendatar.
3. Apa yang Anda rasakan terhadap gaya tegangan tali?
4. Putarlah tali lebih cepat lagi. Adakah pengaruh kelajuan bola dengan gaya
tegangan tali?
5. Apa kesimpulan Anda dari percobaan ini? r T T

*6B92D:<2? +! / $:<2 82H2 36B2D 3@=2 5:232:<2? 82>32B
D6BC63ED >6>A6B=:92D<2? 82H2 82H2 H2?8 36<6B;2 A252 3@=2 H2?8 5::<2D
56?82? D2=: 52? 5:AED2B 56?82? D2?82? C63282: D:D:< AEC2D?H2 2A2D
5:<2D2<2? 329G2 3@=2 D6BC63ED 36B86B2< >6=:?8<2B !2H2 D682?82? D2=: Gambar 5.7
>6BEA2<2? 82H2 H2?8 >6?H6323<2? 36?52 D6BC63ED 36B86B2< Gaya sentripetal menuju pusat
lingkaran.
>6=:?8<2B

Dinamika Gerak 89