pleaseurgent exam after 4 days

Asked by annamirf | 15th Feb, 2010, 12:24: AM

Expert Answer:

Let's say the required weight is W and raft's volume be V.

Weight of raft + weight required to sink it = Buoyancy force.

ρsVg + W = ρwVg

V = 120 kg/ 600 kg/m3 = 1/5

W = ρwVg - ρsVg = (ρw - ρs)Vg = (1000-600)x(1/5)x10 = 800 N.

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Answered by  | 15th Feb, 2010, 05:51: AM

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