Question

Find the pressure in N/cm2 exerted by a force of 21 N on an area of 0.3 cm2.

Answer 1

$\LARGE{ \underline{ \green{ \sf{Required \: answer:}}}}$

In this question, we have to find the pressure exerted by a force and the area of the surface is also given.

Pressure is calculated by force (Thurst) applied on unit surface area.

$\because{\large{ \boxed{ \sf{P = \frac{F}{A}}}}}$

GiveN:

• Force applied by the books = 21 N
• Area of contact = 0.3 cm²

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By using formula,

⇛ P = F / A

Plugging the given values,

⇛ P = 21 N / 0.3 cm²

⇛ P = 210 / 3 N/cm²

⇛ P = 70 N/cm²

So, the pressure exerted by the force on the given area:

$\therefore{ \LARGE{ \boxed{ \green{ \bf{ 70 \: N/{cm}^{2}}}}}}$

And we are done !!

Answer 2

QUESTION :-

Find the pressure in N/cm² exerted by a force of 21 N on an area of 0.3 cm².

GIVEN :-

• Force ⇛ 21 N

• Area ⇛ 0.3 cm²

TO FIND :-

• Pressure ⇛ ? N/cm²

FORMULA APPLIED :-

$↝ \sf pressure \: = \dfrac{force}{area}</p><p></p><p>⠀</p><p></p><p>$

SOLUTION :-

$↝ \sf pressure \: = \dfrac{21 \:N }{0.3 \: {cm}^{2} }$

$↝ \sf pressure \: = \dfrac{210 \:N }{3 \: {cm}^{2} }$

$↝ \sf pressure \: = 70 \: N/cm²$

∴ The pressure of 70 N/cm² exerted by a force of 21 N on an area of 0.3 cm2.

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⭐ ADDITIONAL INFORMATION ⭐

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♪ Pressure

( SI unit → Pascal (pa) or N/m² )

• P = Pressure

• F = applied force

• A = area of contact between the two surface

» Pressure = Force / Area

» Force = Pressure × Area

» Area = Force / pressure