There are 2 school bags, A and B. Bag A is provided with a broader strap while bag B is provided with a thinner strap. For the same load, a school boy likes bag A as he is comfortable with it, but with bag B, he develops pain in his shoulders. This is because
Both A and B.
We know that pressure is the force per unit area. Therefore in bag A, as the straps are broader, the pressure developed would be less than that in bag B for the same load.