MENGHITUNG CEPAT RAMBAT GELOMBANG
Quiz
•
Physics
•
8th - 12th Grade
•
Hard
Quizziz SICC
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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Gelombang di atas memperlihatkan suatu gelombang yang berjalan ke kanan sepanjang suatu medium elastis. Berapa cepat rambat gelombang di dalam medium tersebut, jika frekuensi gelombang 0,4 Hz ?
0,2 m/s
0,3 m/s
0,4 m/s
0,5 m/s
Answer explanation
Diketahui:
λ = 0,5 m
f = 0,4 Hz
Ditanyakan: v = …?
Jawab :
v = λ . f
v = 0,5 . 0,4 = 0,2 m/s
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sebuah tali ujungnya terikat dan ujung lainnya digetarkan, seperti yang ditampilkan pada gambar berikut.
Bila periode gelombang adalah 0,2 sekon, maka cepat rambat gelombang tali tersebut adalah ….
40 m/s
80 m/s
1,6 m/s
8,0 m/s
Answer explanation
Diketahui:
T = 0,2 s
λ = 8 m
Ditanyakan: v = …?
Jawaban:
v = λ/T
v = 8/0,2 = 40 m/s
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebuah tali digetarkan membentuk dua bukit dan satu lembah sepanjang 12 cm. Jika frekuensi gelombang 4 Hz, besarnya cepat rambat gelombang adalah ….
32 cm/s
48 cm/s
0,5 cm/s
2 cm/s
Answer explanation
Diketahui:
Terjadi 2 bukit dan 1 lembah itu artinya membetuk 1,5 gelombang.
λ = 12 cm/1,5 = 8 cm
f = 4 Hz
Ditanyakan: v = ….?
Jawaban:
v = λ . f
v = 8 cm . 4 Hz
v = 32 cm/s
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan gambar rambatan gelombang berikut!
Cepat rambat gelombang di atas adalah ….
0,8 m/s
4,0 m/s
18,0 m/s
36,0 m/s
Answer explanation
Diketahui:
n = 1,5
t = 3 s
λ = 8 m
Ditanyakan: v = ….?
Jawaban:
f = n/t
f = 1,5/3 = 0,5 Hz
v = λ . f
v = 8 m . 0,5 Hz
v = 4,0 m/s
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Seorang siswa mengamati dan mencatat pergerakan gelombang pada permukaan air. Dalam waktu 20 detik, terjadi 5 gelombang. Jika jarak antara 2 puncak gelombang 5 m, hitunglah cepat rambat gelombangnya!
1,25 m/s
2,25 m/s
2,5 m/s
6,25 m/s
Answer explanation
Diketahui:
t = 20 s
n = 5
λ = 5 m
Ditanyakan: v = ….?
f = n/t
f = 5/20 = 0,25 Hz
Dihitung dengan rumus cepat rambat gelombang, maka hasilnya adalah:
v = λ . f
v = 5 m . 0,25 Hz = 1,25 m/s
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