Pressure 1

A woman is in contact with the floor. In which of these poses does she produce the most pressure on the floor? Assume she is wearing flat shoes in each pose.

• A

• B

• C

• D

Which is an example of a force acting over a small area to produce a large pressure?

• A skier wearing large skis on snow.

• A hammer being used to push a nail into a piece of wood.

• A tractor having very wide tyres.

• A person lying down, rather than walking upright on a roof.

A water-filled tank is resting on a table as shown in Fig. Using the measurements in the diagram, determine the area which should be used to calculate the pressure the tank exerts on the table.

• 0.25 m²
• 1.0 m²
• 0.75 m²
• 0.5 m²

The diagram shows four measuring identical cylinders containing either distilled water or concentrated sugar solution. Which measuring cylinder has the least pressure at the base, due to the liquid?

• Cylinder C
• Cylinder B
• Cylinder A
• Cylinder D

For the tank of water in the diagram below, which value gives the pressure on the base of the tank due to the water? The density of water = 1000 kg/m³

• 4500 Pa
• 5000 Pa
• 6000 Pa

• 7000 Pa

A briefcase, with flat, rectangular sides rests on the floor as shown in the diagram. How has the change affected the force on the floor, and the pressure exerted by the briefcase on the floor?

• Force unchanged

  Pressure decreased

• Force unchanged

  Pressure unchanged

• Force decreased

  Pressure decreased

• Force decreased

  Pressure unchanged

A small metal block is suspended under the surface of a beaker of water by a string. The metal block experiences a pressure exerted by the liquid. What would increase the pressure exerted on the metal block?

• increasing the surface area of the stone

• using a liquid with a lower density

• increasing the mass of the metal block

• lowering the metal block deeper into the liquid

Three beakers of water are placed on a table. The depth of water in each container is the same. In which container does the water exert the greatest pressure on the base of the container?

• Container C has the greatest pressure.
• Container A has the greatest pressure.
• The pressure is the same in all containers.
• Container B has the greatest pressure.

The table gives four combinations of the force applied to a surface and the area over which it acts. Which row gives the smallest pressure exerted on the surface?

• A
• C
• D
• B

The ornament in Fig. is designed to balance in either of the positions shown. Calculate the difference in the pressure on the ground when the ornament's position is changed.

• ΔP = 1470 Pa

• ΔP = 2940 Pa

• ΔP = 5760 Pa

• ΔP = 960 Pa