Sam applies a force of 6 N uniformly on the top surface of a book of area 20 cm x 15 cm. Calculate the pressure exerted (in Pa) on the surface of the book due to this force.

400 Pa

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800 Pa

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600 Pa

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200 Pa

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Solution

The correct option is D 200 Pa
Force applied on the book = 6 N
The dimensions of the book is $20 c m \times 15 c m$ .

The area of the surface on which the force is acting = $20 c m \times 15 c m$ = $300 c m ²$ = $0.03 m ²$

The pressure exerted on the surface of the book is,
$P r e s s u r e$ = $\frac{F o r c e p e r p e n d i c u l a r t o t h e s u r f a c e}{A r e a o f t h e s u r f a c e}$

$P r e s s u r e$ = $\frac{6}{0.03}$ = $200 P a$

Hence, option D is correct.

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