Question

worksheet 79

1. the following pictures show some applications of pressure in our everyday lives. study them carefully and answer the questions that follow.

a) explain how pressure is applied in each of the pictures above.
b) why are water tanks placed above the level of the house?
c) why do you think that vehicles that carry heavy loads have many wheels?
d) how is a foundation of a building constructed for it to withstand the weight of the building?

Explanation:

a) For the water - tank, the height creates hydrostatic pressure for water flow. The truck distributes its load's weight over tires to reduce ground pressure. The building's foundation spreads the building's weight to avoid excessive ground pressure.
b) Water tanks are placed above the house to utilize gravity to create pressure for water to flow down to different parts of the house easily.
c) Vehicles with heavy - loads have many wheels to increase the area of contact with the ground, reducing the pressure exerted on the ground to prevent sinking or damage.
d) A building's foundation is constructed with a large base area to spread the weight of the building over a large area of the ground, reducing the pressure on the ground and ensuring stability.

Answer:

a) Water - tank: Height creates hydrostatic pressure for water flow. Truck: Distributes load weight over tires to reduce ground pressure. Building: Foundation spreads building weight to avoid excessive ground pressure.
b) To utilize gravity for water flow by creating pressure.
c) To increase contact area and reduce ground - pressure.
d) By constructing a large base area to spread the building's weight and reduce ground pressure.