why is it difficult to hold a School Bag having a strap made of a thin and strong string explain your answer
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It is difficult to hold a school bag having a strap made of thin and strong string, because the thin string has very less contacting area in case of a school bag having a strap made of thin and strong string which increases pressure which is un comfortable to carry the school bag.
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because the pressure is increased due to low area of intersection which further leads to shoulder pain
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