Atmospheric pressure is nearly 100KPa. How large does the air in a room exert on one side of a window of dimensions $40 c m \times 80 c m$ ?

64 kN

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32 kN

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96 kN

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100 kN

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Solution

The correct option is B
32 kN

Given, $P = 100 K P a = 100 \times 10^{3} P a$

And area $A = 40 c m \times 80 c m = 0.32 m^{2}$

$F = P A = 10^{5} \times 0.32 m^{2}$

$F = 32 K N$

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