Pressure Quiz

What do we need to measure to calculate the pressure acting on a surface?

• The size of the force and the area it acts upon

• The size of the mass and the volume it occupies

• The size of the weight and the height it falls from

• The size of the speed and the distance it travels

Answer explanation

To calculate the pressure acting on a surface, we need to measure the size of the force and the area it acts upon.

What is the formula for calculating pressure?

• Pressure = Force/Volume

• Pressure = Force/Area

• Pressure = Mass/Area

• Pressure = Mass/Volume

Answer explanation

The formula for calculating pressure is Pressure = Force/Area. Pressure is defined as force per unit area, so the correct formula is Pressure = Force/Area.

What are the units of pressure?

• N/m

• N/m²

• N/m³

• N/m⁴

Answer explanation

The correct units of pressure are N/m², which represents Newtons per square meter. Pressure is defined as force per unit area, hence the unit N/m².

To work out the pressure acting on a surface, we need to measure the __________ it acts upon.

• volume

• area

• height

• distance

Answer explanation

To work out the pressure acting on a surface, we need to measure the area it acts upon. Pressure is force per unit area, so the area is crucial in calculating pressure.

Can you estimate the pressure that your feet put on the floor?

• Yes

• No

• Maybe

• Not sure

Answer explanation

Yes, it is possible to estimate the pressure that your feet put on the floor by using specific tools or calculations based on weight distribution and surface area of contact.

Which of the following is NOT needed to calculate pressure?

• Force

• Area

• Volume

• None of the above

Answer explanation

Volume is NOT needed to calculate pressure. Pressure is calculated using force and area, not volume.

If the force acting on a surface increases, what happens to the pressure if the area remains constant?

• Pressure decreases

• Pressure remains the same

• Pressure increases

• Pressure becomes zero

Answer explanation

If the force acting on a surface increases while the area remains constant, the pressure will increase. Pressure is directly proportional to force when area is constant (P = F/A).

If the area on which a force acts increases, what happens to the pressure if the force remains constant?

• Pressure decreases

• Pressure remains the same

• Pressure increases

• Pressure becomes zero

Answer explanation

If the area on which a force acts increases while the force remains constant, the pressure decreases. This is because pressure is inversely proportional to the area over which the force is distributed.

What is the relationship between force and pressure when the area is constant?

• Directly proportional

• Inversely proportional

• No relationship

• Exponentially proportional

Answer explanation

When the area is constant, force and pressure are directly proportional. This means that as force increases, pressure also increases, and vice versa.

What is the relationship between area and pressure when the force is constant?

• Directly proportional

• Inversely proportional

• No relationship

• Exponentially proportional

Answer explanation

When the force is constant, area and pressure are inversely proportional according to the relationship between them.