sepotong besi dalam zat cair mendapat gaya keatas sebesar 4N massa jenis zat cair 1000kg/m3, massa jenis besi 7500 kg/m3 dan percepatan gravitasi 10m/s2 . berapa berat besi di udara/ jelaskan.
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Fa = rho. g . Vbenda
4 = 1000 . 10 . Vbenda
V benda = 0,0004 m^3
(V benda : volume benda )
massa jenis benda = massa / Volume Benda
7500 = massa / 0,0004
massa benda = 3 kg
berat benda = m . g = 3. 10 = 30 N