Question

Why do school bags have broad straps ? What is the problem faced by a child if straps were narrow ?

Answer 1

we know that there is application of pressure that is if the contct area is more than pressure is less if contact area is less than prrrssure is more if the area of the bag straps is less than pressure is more it is difficult to carry heavy books because area is less than pressure is more now if the area is more pressure is less now we can carry heavy books easily because area is more than pressure is less

Answer 2

our school bag have board starps because boards straps give area more and as we know that when the area is increasing then the pressure is decreases and when area is decreases pressure is increases.
the children faced problem if they bag strap were narrow because pressure is increasing the child due to the low area