A fisherman in Trinidad notices his wooden pirogue (fishing boat) sinks lower in the water when fully loaded with fish. Which of the following best explains this observation?

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Question

A fisherman in Trinidad notices his wooden pirogue (fishing boat) sinks lower in the water when fully loaded with fish. Which of the following best explains this observation?

Accepted Answer

The loaded boat displaces more water to support its increased weight — When the fish are added, the total weight of the system increases. For the boat to remain afloat, the upthrust must increase, which requires a greater volume of water to be displaced — so the boat sits lower. Option D is wrong because the wood's density is unchanged by adding fish. Option A is wrong because upthrust actually increases as more volume is submerged. Option B is wrong because in an open sea or large body of water, the change in water level around the boat is negligible.

Answer

The loaded boat displaces more water to support its increased weight

Answer

The upthrust decreases as more weight is added to the boat

Answer

The water level around the boat falls as the boat sinks lower

Answer

The density of the boat's wood decreases when the load is added

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