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Verified answer
Nomor 1-------------
1/4 getaran : B - A
1/2 getaran ; B - A - B
Nomor 2
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Diket :
Jumlah getaran, n = 40 Kali
Waktu getaran, t = 8 detik
Frekuensi
f = n/t
f = 40/8
f = 5 Hz
Periode
T = 1/f
T = 1/5
T = 0,2 detik
Nomor 4
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Diketahui gambar gelombang
Tanya :
A. Amplitudo
A = 1,5 m
B. Panjang gelombang
2,5 Lambda = 10 m
Lambda = 10/2,5
Lambda = 4 m
C. Cepat rambat gelombang
Jika waktu 10 detik
2,5 T = 10 detik
T = 10/2,5
T = 4 detik
Maka cepat rambat
V = Lambda / T
V = 4 / 4
V = 1 m/s
Nomor 5
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kedalaman sumur, s = 8 m
Cepat rambat, V = 320 m/s
Tanya :
Waktu, t = __?
Jawab :
S = (V x t) / 2
t = 2.S / V
t = 2•8 / 320
t = 160 / 320
t = 0,5 detik
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FZA
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