Physics (AS & A Level) · Oct / Nov 2024 · Paper 13 · Question 5

Four cuboids with identical lengths, breadths and heights are immersed in water. The cuboids are held at the same depth and in identical orientations by vertical rods, as shown. Water has density ρ. Cuboid W is made of material of density 4ρ. Cuboid X is made of material of density 2ρ. Cuboid Y is made of material of density ρ. Cuboid Z is made of material of density 0.5ρ. Which statement is correct?

1. AThe upthrust of the water on each of the cuboids is the same.
2. BThe upthrust of the water on W is twice the upthrust of the water on X.
3. CThe upthrust of the water on X is twice the upthrust of the water on W.
4. DThe upthrust of the water on Y is zero.

As printed in the paper