A square wooden raft floats on a lake. The density of the water in the lake is 1000 kg m-3.
The sides of the raft are 2.5 m long and the thickness of the raft is 0.20 m.
The mass of the raft is 800 kg.
How many barrels, each of mass 75 kg, could be placed on the raft before its surface sinks to the surface of the water?
4
6
8
10
169 exam-style questions on CIE IGCSE Physics Density, covering Density. Each one has a worked solution and a mark scheme showing where the marks go.