Question

why is it difficult to hold a school bag having a strap made of a thin and strong string
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Answer 1

Answer:

the answer of this question is:

Explanation:

It is difficult to hold a school bag having a thin strap because the pressure on the shoulders is quite large. ... In the case of a thin strap, the contact surface area is very small. Hence, the pressure exerted on the shoulder is very large.

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Answer 2

Answer:

If surface area is less than pressure applied will be more and if surface area is more than pressure applied will be less. Hence in the case of a school bag, the strap has a lesser surface area soo pressure applied will be more, hence making it difficult to hold the bag.