Question

There are two school bags A & B. The bag A is provided with a broader strap than the bag B. For the same load, a student likes the bag A as he feels more comfortable with it. This must be because:

• A. The force experienced from the bag A is lesser than that from B.
• B. The straps of the bag B produce more pressure.
• C. The straps of the bag B produce less pressure.
• D. The straps of the bag A produce less pressure.

Answer 1

Answer: (B), (D)

The straps of the bag A produce less pressure.

$\text{Pressure}=\frac{\text{Force}}{\text{Area}}$

As we know, pressure is the thrust (force) acting per unit area. Thus, for the same load, a larger surface area would result in a lesser pressure.
Also, it is given that the straps of the bag A are broader than those of B. Hence, the pressure experienced by the student would be lesser than with the case of the bag B. Hence, the boy feels more comfortable with bag A than with B.