Questions and Answers
Why are army tanks designed to move on caterpillar wheels?
Army tanks use caterpillar wheels to increase their surface area, which helps reduce the pressure exerted on the ground and prevents them from sinking.
How does a wide foundation benefit buildings?
A wide foundation allows the weight of the building to spread over a larger area, which reduces the pressure on the ground and prevents sinking.
In what way does a porter’s turban help when carrying heavy loads?
A porter wears a turban to increase the area of contact between the load and his head, which reduces the pressure and makes it more comfortable to carry.
What is the purpose of broad straps on school and shopping bags?
Signup and view all the answers
Why are wide wooden sleepers placed below railway tracks?
Signup and view all the answers
Why do pointed nails go deeper into surfaces than blunt ones?
Signup and view all the answers
How do cutting tools utilize the concept of pressure?
Signup and view all the answers
Explain why a lady finds it difficult to walk on a muddy road with pointed heel sandals.
Signup and view all the answers
Why do heavy trucks have multiple tyres?
Signup and view all the answers
What advantage do camels have in sandy terrains compared to horses?
Signup and view all the answers
Why do skiers use long flat skis on snow?
Signup and view all the answers
How does the pressure exerted by narrow heeled sandals compare to broad heeled shoes?
Signup and view all the answers
What is the relationship between area of contact and pressure when applying force?
Signup and view all the answers
Study Notes
Examples of Pressure in Our Daily Life
Decrease in Area Increases Pressure
- A nail has a sharp pointed end and a blunt flat end; the sharp end exerts greater pressure due to a smaller contact area, allowing it to penetrate surfaces effectively.
- Cutting tools like blades and knives feature sharp edges, which reduce contact area and therefore increase pressure when force is applied.
- Pointed heel sandals exert more pressure on soft surfaces like mud compared to flat heels, making walking difficult on such terrains.
- A narrow heeled sandal causes more discomfort than a broad heeled shoe because the narrower heel exerts greater pressure on the ground.
Increase in Area Decreases Pressure
- Heavy trucks have six to eight tires to increase the area of contact, thereby reducing pressure exerted on the ground.
- Camels, which have broader feet than horses, move more easily on sand as their wider feet lower pressure, preventing sinking.
- Skiers utilize long, flat skis to create a larger contact area with snow, minimizing pressure and enabling smoother sliding without sinking.
- Army tanks operate on broad caterpillar wheels rather than narrow tires, increasing surface area to reduce ground pressure and prevent sinking.
- Building foundations are designed to be wide, allowing the weight to be distributed over a larger area, which decreases pressure and prevents sinking into the earth.
- Porters wear turbans to enhance load distribution on their heads, thereby increasing contact area and reducing pressure during transport.
- School and shopping bags are equipped with broad straps to increase the area of pressure on shoulders or hands, minimizing discomfort.
- Wide wooden sleepers are placed under railway tracks to lower ground pressure exerted by the weight of the rails, preventing sinking.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the concepts of force and pressure in everyday life through specific examples. Understand how the shape and area of an object affect pressure, such as sharpening tools for better efficiency. This quiz will enhance your comprehension of these physical principles.