Question

Consider two shoulder bags, one with a thin strap, and the other with a wide strap. If both the bags are equally heavy, the bag with the wide strap will be more comfortable to carry because

• A. the thin strap has greater inertia per unit length
• B. the thin strap causes greater momentum to be exerted
• C. the wide strap allows friction to be spread over a bigger area, thus reducing force between shoulder and the strap
• D. the wide strap enables the weight of the bag to be spread over a bigger area, thus reducing the pressure on the shoulder.

Answer 1

The correct option is D the wide strap enables the weight of the bag to be spread over a bigger area, thus reducing the pressure on the shoulder.

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

So Pressure is inversely proportional to Area. So wider stríps have more area - so less pressure will be applied on shoulder than thinner strips. Therefore, wider strips are comfortable.

So Ans is D