KINEMATICS -ACCELERATION

 KINEMATICS - ACCELERATION
Acceleration due to gravity(g):
What is Gravity?
Gravity is the force with which earth attracts a body towards its center.

Acceleration due to gravity(g):
    When the object falls towards the earth due to the earth’s gravitational force, it something we call as free fall of the object.  So,during the free fall, the only force acting on the object is the gravitational force of the earth. The acceleration due to gravity is the acceleration produced in the freely falling body due to the influence of the gravitational pull of the earth.                              
    Acceleration due to gravity is the acceleration gained by an object due to the 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, but its values vary. Like, for example, the acceleration due to gravity on the moon is different from that of the earth.
Usually we consider the values for g =9.8 m/s² (or) 10 m/s²
Important points about acceleration due to gravity:
1.    When the depth d = 0, the value of g on the surface of the earth = g.
2.    When the depth d = Radius of earth, the value of g at the center of the   earth = 0.
3.    For an object placed at a height h, the acceleration due to gravity is less as compared to that placed on the surface.
4.    As depth increases, the value of acceleration due to gravity (g) falls.
5.    The value of g is more at poles than at the equator.