Question

G. Answer the following in brief.
1. What is pressure? How does it change with area?​

Answer 1

Answer:

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure)is the pressure relative to the ambient pressure.

Pressure is the amount of force applied at right angles to the surface of an object per unit area. The symbol for it is p or P.

Mathematically:

${\displaystyle p={\frac {F}{A}},}$

where:

p is the pressure,

F is the magnitude of the normal force,

A is the area of the surface on contact.

Pressure is a scalar quantity. It relates the vector area element (a vector normal to the surface) with the normal force acting on it. The pressure is the scalar proportionality constant that relates the two normal vectors:

${\displaystyle d\mathbf {F} _{n}=-p\,d\mathbf {A} =-p\,\mathbf {n} \,dA.}$

Answer 2

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure)is the pressure relative to the ambient pressure.

Pressure is the amount of force applied at right angles to the surface of an object per unit area. The symbol for it is p or P.