Page 9 - Pressure 10 class

some application of pressure

Nails or needles are made pointed.

➢ Pointed parts of nails or needles cover less area. when

area is less, it exerts more pressure and vice versa. Since

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pressure is inversely proportional to area (i.e. P∝ )

keeping force constant. With the increase in pressure of

needles or nails it becomes easier to penetrate on the

wall or to sew clothes, respectively. Hence, nails are

made pointed.

Foundation of building is made wider.

➢ when foundation of building is made wider it covers

more area. when area increases, pressure decreases.

Since pressure is inversely proportional to the area (i.e.

1
P∝ ) keeping force constant. With the less pressure

the building will stand steadily and do not get destroy.

Hence foundation of building is made wider.

July 30, 2020 Taranath Baral/GC Shiba/Suraj Thapaliya 9