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A raft of wood (density=600kg//m^(3)) of...

A raft of wood (density`=600kg//m^(3))` of mass `120 kg` floats in water. How much weight can be put on the raft to make it just sink?

A

80 kg

B

50 kg

C

60 kg

D

30 kg

Text Solution

Verified by Experts

The correct Answer is:
A
`Mg + mg = F'_B = rho_omega Vg`
`Mg + mg = rho_omega (M)/(sigma) g`
`m = ((rho_omega)/(sigma) -1) M = ((1000)/(600) -1) xx 120 = 80 kg`.
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