Why are the straps of a schoolbag made wider?

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To decrease the pressure exerted by the bag on the shoulder.

To decrease the force exerted by the bag on the shoulder.

To increase the force exerted on the bag.

To decrease the gravitational force exerted on the bag.

answer is B.

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Detailed Solution

Pressure is defined as the perpendicular force exerted per unit area.
The formula of pressure is given by:
$Pressure = \frac{Force}{Area}$
We can see that force is inversely proportional to the area on which the force is exerted.
Hence, when the force is distributed on a larger surface area, the pressure is reduced.

Therefore, the straps of the bags are made wider to reduce the pressure on the shoulder.