Question

8. The Surface area of an object is
$20 {}^{2} m$
and, as forces of 10N
is applied on it than what is the pressure?​

Answer 1

Answer :

• 0.5 Pa

Given Information :

• Surface Area (A) = 20 m²

• Force applied (F) = 10 N

To calculate :

• Pressure exerted (P)

Calculation :

As we know that, pressure is given by the formula given below :

$\boxed { \sf { P = \dfrac{F}{A} }}$

• P denotes pressure.
• F denotes fore applied.
• A denotes area.

Substituting the values,

$\longmapsto \sf { P = \dfrac{10 \: N}{20 \: m^2} }$

$\longmapsto \sf { P = \dfrac{1 \: N}{2 \: m^2} }$

$\longmapsto \sf\red { P = 0.5 \: N/m^2 }$

Therefore, pressure is 0.5 N/m² or 0.5 Pa.

★ Some extra information :

• Pressure is defined as force per unit area.

• SI unit of pressure is Pa (Pascal) . It is on the name of the scientist who worked and gave his contribution to understand liquid pressure.

• 1 Pa = 1 N/m²

• If the area is more, pressure will be less.

• If the area is less, pressure will be more.

• If force applied is more, pressure will be more.

Answer 2

Surface area = 20 m²

Mag. of force exerted = 10 M

Formula: Pressure = (Force)/(Area)

⇒ P = (10)/(20) Pa

⇒ P = 0.5 Pa (answer).

More:-

• Given physical quantity is derived.
• Its dimension formula is M¹L-¹T-².
• Fluid pressure = dgh.