Question

एक पतली परन्तु मजबूत डोरी से बने पट्टे की सहायता से किताबों से भरे स्कूल बैग को उठाना कठिन होता है, क्यों?

Answer 1

Answer: Beacuse surface area is less.so, it increase pressure.

Explanation:

Pressure depends on (i) its magnitide (ii) the area over which it acts.

As surface area increases, pressure will decrease. So it is hard to carry bag with narrow thin string.

Answer 2

Pressure

Explanation:

The force acting on an object per unit its area is called pressure exerted. Mathematically, it is given by :

$P=\dfrac{F}{A}$

F is force

A is area

Pressure is inversely proportional to the area of cross section. If the strap of bag is narrow, then its area is less. It means it will exert a more pressure on the person's back. But if the strap is broad, then the area of cross section is more. Hence, it is exert a less pressure on the person's back.

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Pressure

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