Bank Soal IPA SMP Keuntungan Mekanik
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Perhatikan gambar berikut!
sumber: ilmuhitung.com
Jika gaya minimum yang diberikan adalah 700 N, massa benda adalah .... (g = 10 m/s2)
Pembahasan:
Diketahui:
Gaya = F = 700
Keuntungan mekanik dari katrol berganda sesuai dengan jumlah tali yang menyokong beban.
Keuntungan mekanis = KM = 4
Ditanya:
Massa beban (m)
Dijawab:
KM = w F
w = KM F
w = 4 700
w = 2.800 N
Menghitung massa beban
w = m g
m = w g
m = 2.800 10
m = 280 kg
Jadi, massa benda adalah 280 kg.
Rangkuman
Bab 5 | Bagian Tubuh Hewan | IPA | Kelas 4
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