Moments and Pressure

Army tank tracks are useful for travelling through the mud because..

• they decrease the force the vehicle exerts on the ground
• they increase the force the vehicle exerts on the ground
• they decrease the pressure the vehicle exerts on the ground
• they increase the pressure the vehicle exerts on the ground

The amount of force pushing on an area is the definition of....

• Fluid
• Viscosity
• Barometer
• Pressure

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 more pressure than the boot as a result of an decrease in surface area.
• The bottom of the shoe exerts the same pressure as the bottom of the boot.

Tags

NGSS.MS-PS2-1

Pressure is equal to force divided by what

• area
• mass
• time
• distance

What does pressure measure?

• Strength
• Force exerted on a given area of surface

A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?

• The person wearing the boots because the boots have a larger surface area in contact with the floor
• The person with the stiletto heels because they have a larger surface area in contact with the floor
• The person wearing the boots because the boots have a smaller surface area in contact with the floor 
• The person with the stiletto heels because they have a smaller surface area in contact with the floor

What is the equation used to calculate pressure?

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

What is the anticlockwise moment acting on this crane?

• 80,000Nm
• 100,000Nm
• 120,000Nm
• 140,000Nm

Why is it easier to cut something with a sharp knife than with a blunt one?

• The area of the knife edge is large so pressure is greater.

• The area of the knife edge is small so pressure is greater.

• The area of the knife edge is large so pressure is smaller.

• The area of the knife edge is small so pressure is smaller.

If all these birds are the same weight, which bird has the lowest pressure under its feet?

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