How much do you know about Pressure

A brick of weight 80 N stands upright on the ground as shown.

What is the pressure it exerts on the ground?

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Which object exerts the greatest pressure on the ground?

• Object A

• Object B

• Object C

• Object D

The rudder of a large ship is operated hydraulically. Oil at high pressure exerts a force F on a piston that in turn moves a level arm.

The oil is at a pressure of 500 kPa and the surface area of the piston is 0.20 m².

What is the size of F?

• 100 N

• 2500 N

• 100 000 N

• 250 000 N

The diagram shows a glass block resting on a table top.

The area of the block in contact with the table is X and the area of the table top is Y.

The weight of the block is Q and the weight of the table is R.

Which expression gives the pressure exerted on the block by the table?

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One side of a vertical garden fence has an area of 4.0 m². A strong wind blows on one side of the fence and increases the pressure to 105 kPa. The pressure on the other side of the fence is 103 kPa.

What is the resultant force on the fence?

• 500 N

• 8 000 N

• 16 000 N

• 420 000 N

The system shown in the diagram contains an incompressible liquid.

The pressure acting on piston K and the pressure acting on piston K are the same.

A downward force of 80 N is exerted on piston K.

What is the upward force on piston L?

• 1 N

• 4 N

• 80 N

• 1600 N

A hydraulic jack is used to lift a load of mass 1000 kg by applying a force F to piston P.

The cross-sectional area of piston P is 100 cm² and the cross-sectional area of piston Q is 500 cm².

The gravitational field strength g is 10 N/kg.

The pressure acting on piston P and the pressure acting on piston Q are the same.

What is the value of the force F?

• 200 N

• 2000 N

• 5000 N

• 50 000 N