Question

A raft of wood (density $400kg/m^3$) of mass $120kg$ floats in water. How much weight can be put on the raft to make it "just sink"?

Answer 1

Answer:

we know that

volume = mass/density

volume= 120/400

volume= 3/10 m^3

let the mass of object = (120+w)

density of water = 1000 kg/m^3

density = mass / volume

1000= 120+w/3/10

300= 120+ w

w= 300-120

w= 180 kg.

hope it helps u

Answer 2

Answer:

180 kg

as we know 300 - 120 kg = 180 kg