Question

A SCHOOL BAG IS PROVIDED WITH WIDE STRIPES ?

Answer 1

This increases the area of contact. pressure =force /area. when the area of contact increases the pressure decreases.
thus to reduce the pressure on the shoulders school bags are provided with wide stripes.

Answer 2

Answer:

A school bag is provided with wide strips so that the weight of bag may fall over a large area of the shoulder of the child producing less pressure on the shoulders and due to less pressure it is more comfortable to carry the heavy school bag.

Hope it help's you !