Question

There are two 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 schoolboy likes bag A as he is comfortable with it but with bag B, he develops a pain in his shoulders. This is because:

• A. Bag A has a broader strap than B, due to which the pressure felt is less for the same load.
• B. Bag B has a thinner strap than A, due to which the pressure felt is more for the same load.
• C. Both A & B
• D. None of these

Answer 1

Answer: (A), (B)

The correct options are
A

Bag A has a broader strap than B, due to which the pressure felt is less for the same load.

B

Bag B has a thinner strap than A, due to which the pressure felt is more for the same load.

We have known that pressure is defined as force per unit area. Here in bag A, the straps are broader (more area) hence the pressure gets distributed over a large area. But in bag B, as the straps are narrower (less area), the pressure increases and that's why he feels a pain in his shoulders.