Question

define pressure, acceleration due to gravity​

Answer 1

Explanation:

Pressure:

The amount of force exerted (thrust) on a surface per unit area is defined as ‘Pressure’. It can also be defined as the ratio of the force to the area (over which the force is acting).

Formula and Unit of Pressure

Pressure (P) = Thrust/ Area

The SI unit is ‘pascals (Pa)’. 1 Pa = 1N/m2

Example: It is easier to hammer a sharp pin than to hammer a blunt pin. This is because the area at the end of the sharp pin is smaller than the area at the end of a blunt pin. This leads to an increase in pressure leading to hammer the sharp pin easily.

What is Acceleration due to Gravity?

Acceleration due to gravity is the acceleration gained by an object due to gravitational force.

Its SI unit is m/s2.

It has both magnitude and direction, hence, it’s a vector quantity.

Acceleration due to gravity is represented by g.

The standard value of g on the surface of the earth at sea level is 9.8 m/s2.