A porter keeps a towel on his head to carry a load to _____.

minimise the pressure due to the load

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balance the load

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increase the pressure due to the load

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reduce the pressure to zero due to the load

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Solution

The correct option is A minimise the pressure due to the load
From definition of pressure,
$P r e s s u r e = \frac{F o r c e}{A r e a}$

Here, the force applied is kept constant and the pressure is inversely proportional to the area. By keeping a towel on the head, the porter increases the contact area and hence minimizes the pressure that the load exerts on his head.

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