The value of g is minimum at equator
If earth stapes its rotation about its own axis , then g will remain unchanged at poles but increases by Rω 2 at equator .
( iii ) Effect of Altitude The value of g at height h from earth ’ s surface g ’ = g / ( 1 + h / R ) 2
Therefore g decreases with altitude .
( iv ) Effect of Depth The value of gat depth h A from earth ’ s surface g ’ = g * ( 1 – h / R )
Therefore g decreases with depth from earth ’ s surface . The value of g becomes zero at earth ’ s centre .
Gravitational Field
The space in the surrounding of any body in which its gravitational pull can be experienced by other bodies is called gravitational field .
Intensity of Gravitational Field
The gravitational force acting per unit mass at Earth any point in gravitational field is called intensity of gravitational field at that point .
It is denoted by Eg or I .
Eg or I = F / m