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Why is it difficult to hold a school bag having a strap made o... - Science
Question
Why is it difficult to hold a school bag having a strap made of a thin and strong string?
Answer
It is difficult to hold a school bag having a thin strap because:
Pressure is inversely proportional to the surface area on which force acts (Pressure = Force / Area).
A thin strap has a very small surface area.
Therefore, the weight of the bag exerts a large pressure on the shoulder, making it painful and difficult to hold.