Review Pressure Past Paper Question

The water in a swimming pool exerts a pressure at the bottom of the pool. Which graph shows the relationship between the pressure exerted by the water and the depth of water in the pool? (Assume the density of water is constant.)

(Oct/Nov 2023 paper 21)

• A

• B

• C

• D

An object is a depth h below the surface of a liquid. The pressure due to the liquid at this depth is p. The gravitational field strength is g. What is the density ρ of the liquid?

(Oct/Nov 2023 paper 22)

An object is immersed in a liquid of density ρ. The pressure at this depth due to the liquid is p. The gravitational field strength is g. What is the equation for the depth h of the object beneath the surface?

(Oct/Nov 2023 paper 23)

An object taken underwater will be damaged if the total pressure acting on it is greater than 2.1 MPa. What is the maximum depth that the object can be taken underwater before it breaks? atmospheric pressure = 101 000 Pa density of water = 1000 kg /m³

(May/June 2024 paper 23)

• 150 meters

• 225 meters

• 300 meters

• 204 meters

A dam holds water in a reservoir. The height of the water in the reservoir is 15 m. The density of water is 1000 kg/ m³ . What is the pressure due to the water at the bottom of the dam?

(May/June 2023 paper 21)

• 150 000 Pa

• 6.8 Pa

• 1500 Pa

• 15 000 Pa

The density of sea water is 1030 kg /m³ . The gravitational field strength on the Earth is 9.8N/ kg. Atmospheric pressure is 101 000 Pa. At which depth in sea water is the total pressure due to the atmosphere and the water equal to 513 000 Pa? (May/June 2023 paper 22)

• 498 m

• 400 m

• 50.8 m

• 40.8 m

The graph shows how the pressure due to a liquid varies with the depth beneath the liquid surface. The gravitational field strength g is 9.8 N/ kg. What is the density of the liquid? (May/June 2023 paper 22)

• 820 kg/m³

• 2000 kg/m³

• 8200 kg/m³

• 200 kg/m³

The diagram shows a column of liquid. The pressure, due to the liquid, at the bottom of the liquid is 6000 N/m² .

What is the density of the liquid? (March 2024 paper 22)

• 250 kg/m³
• 100 kg/m³
• 500 kg/m³
• 1200 kg/m³

The diagram shows a rectangular block of weight 16 N. It is resting on a flat surface.

What is the pressure at the base of the block due to its weight? (March 2024 paper 22)

• 0.089 N/cm²

• 320 N/cm²

• 0.36 N/cm²

• 0.8 N/cm²

The diagram shows a tank containing sea water. The density of the sea water is 1020 kg/m³ . What is the pressure at point P relative to atmospheric pressure?

• 7400 Pa above atmospheric pressure

• 7500 Pa above atmospheric pressure

• 75 000 Pa above atmospheric pressure

• 82 000 Pa above atmospheric pressure