SURFACE AREA AND PRESSURE

SURFACE AREA AND PRESSURE

By KASMAWATI Moe

Multiple Choice

What does pressure measure?

• Strength
• Force exerted on a given area of surface

Multiple Choice

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area

Multiple Choice

What is the unit of measurement for pressure?

• pascal
• grams
• milliters
• meters

Multiple Choice

Look at the pressure triangle. How do we calculate the area?

• f ÷ a
• f x p
• p x f
• f ÷ p

Multiple Choice

Look at the pressure triangle. How do we calculate the force?

• f ÷ a
• f x p
• p x a
• f ÷ p

Multiple Choice

Pressure is measured in what units

• Newtons
• m/s
• Pascals
• Moles

Multiple Choice

Pressure is equal to force divided by what

• area
• mass
• time
• distance

Multiple Choice

Pressure can be measured in Pascales (Pa) or Newtons per square metre.
1 Pa = 1N/m2

• True
• False

Fill in the Blanks

A metal cylinder has a cross-sectional area of 2cm² and has a weight of 200N. Find the pressure it exerts on the table. (Include units in your answer)

​Did you get it?

Multiple Choice

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area

Multiple Choice

Pressure can be measured in Pascals (Pa) or Newtons per square metre.

1 Pa = 1N/m²

• True
• False

Multiple Choice

What does N/m² mean?

• Newtons per squared metre

• Kilograms per squared mile

• Squared metres per newton

Multiple Select

What are the possible units of measurement for pressure?

• Pa

• N/cm²

• m

• N/m²

Multiple Choice

What pressure does a 4000N horse exert on the ground if each foot is 10cm²?

• 40 N/cm²
• 100 N/cm²
• 400 N/cm²
• 10 N/cm²

Multiple Choice

Pressure decreases when the surface area over which a force is applied increases

• True
• False

Multiple Choice

A force of 240 N is applied to an area of 6.0m². how much pressure is being applied to the surfaced?

• 14,400 Pa

• 40 Pa

• 240 Pa

• 6.0 m²

Multiple Select

A person weighs 700N and their feet have a surface area of 0.1m². How much pressure is exerted?

• 7000N/m²

• 70N/cm²

• 100N/m²

Multiple Choice

A force creates a pressure of 12 Pa over an area of 6.0 m². What is the magnitude of this force?

• 72 N

• 12 N

• 6.0 N

• 2 N

Multiple Choice

The pressure resulting from a force of 50 N exerted over an area of 5 m² is

• 10 N
• 0.1 N
• 10 N/m²

• 0.1 Pa

Multiple Choice

Why won't you sink in mud if you wear boots?

• Because the surface area is larger creating less pressure.

• Has air in it to keep you floating.

• Because the mud won't want you.

Multiple Choice

Which of these animals would probably cause the greatest pressure on the ground?

• A fat cow with big feet
• A fat cow with small feet
•  A calf with big feet
• A calf with small feet

Multiple Choice

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
• The bottom of the shoe exerts less pressure than the boot as a result of an i in surface area.

• The bottom of the shoe exerts the same pressure as the bottom of the boot.

Multiple Choice

If an object's surface area is smaller does it create more or less pressure?

• More

• Less

• The same

Multiple Choice

If you're walking in snow why would you wear boots instead of high heels?

• Because boots have a higher surface area making the pressure less and stopping you from sinking.

• Because it's more comfortable

• No, high heels are better

Multiple Choice

Why do you wear studs on grass?

• Because the studs create more pressure allowing it to grip into the grass.

• Stylish

• Creates friction

Multiple Choice

Which situation produces more force on the floor?

• standing on one foot

• standing on two feet

• standing on four feet

• all produce the same force

Multiple Choice

Which situation produces more pressure on the floor?

• standing on one foot

• standing on two feet

• standing on four feet

• all produce the same pressure

Multiple Choice

A child sits on a three-legged stool. How does the pressure change when the child leans over so that only two legs of the stool touch the floor?

• The pressure does not change.

• The pressure decreases.

• The pressure increases.

Fill in the Blanks

Snowshoes prevent the person from sinking into the soft snow. It is because

Multiple Choice

What is the pressure in the hydraulic fluid on the left piston?

• 1210 N
• 484 N/m²
• 8000 N
• 3025 N/m²

Fill in the Blanks

A beaker of water has a weight of 2.5N and a base area of 50 cm². Find the

pressure, in pascal, exerted by the beaker of water on the surface of the table. (Do not include units in your answers)

Fill in the Blanks

What is the function of boxing gloves? Suggest how it works.