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Thrust & Pressure

A rectangle w...

Question

A rectangle wooden block has length, breadth and height of 50 cm, 25 cm and 10 cm, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?

(a) the maximum pressure is exerted when the length and breadth form the base
(b) the maximum pressure is exerted when length and height form the base
(c) the maximum pressure is exerted when breadth and height form the base
(d) the minimum pressure is exerted when length and height form the base

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Solution

Ans: c The maximum pressure is exerted when breadth and height form the base.
This is because the pressure is inversely proportional to the surface area.

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