An engineer in the Netherlands is designing a dam to hold back seawater. The seawater has a density of 1025 kg/m³. Which statement correctly describes how pressure varies with depth behind the dam?

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Question

An engineer in the Netherlands is designing a dam to hold back seawater. The seawater has a density of 1025 kg/m³. Which statement correctly describes how pressure varies with depth behind the dam?

Accepted Answer

Pressure increases linearly with depth — Award 1 mark for recognising that pressure increases linearly with depth (p = ρgh, where h is depth). A is incorrect — pressure increases, not decreases, with depth. B is incorrect — pressure depends on depth. D is incorrect — the relationship is linear (directly proportional), not exponential.

Answer

Pressure increases exponentially with depth

Answer

Pressure increases linearly with depth

Answer

Pressure is greatest at the surface and decreases with depth

Answer

Pressure is the same at all depths

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