Chapter 8, Problem 5RAT

A block of wood with a flat rock tied to its top floats in a bucket of water. If the wood and rock are turned over so the rock is submerged beneath the wood, the water level at the side of the bucket

(a) rises.

(b) falls.

(c) remains the same.

(d) But with the rock beneath the wood, both rock and wood sink.

To determine

The correct option for the statement “A block of wood with a flat rock tied to its top floats in a bucket of water. If the wood and rock are turned over so the rock is submerged beneath the wood, the water level at the side of the bucket".

Answer to Problem 5RAT

The correct option for the statement “A block of wood with a flat rock tied to its top floats in a bucket of water. If the wood and rock are turned over so the rock is submerged beneath the wood, the water level at the side of the bucket" is option (c).

Explanation of Solution

Initially, the block of wood is floating on the bucket of water. Then, the wood and rock are turned over and the rock is submerged. The system's weight will always be the same that is before and after the wood and rock turned over.

The volumetric displacement of water is not changed. The column of water will not alter because the volume of displaced water is the same. This is the reason that the water level at the side of the bucket does not change.

Conclusion:

Therefore, the correct option for the statement “A block of wood with a flat rock tied to its top floats in a bucket of water. If the wood and rock are turned over so the rock is submerged beneath the wood, the water level at the side of the bucket" is option (c).