RELATIONSHIP BETWEEN SMALL g AND CAPITAL G

G stands for gravitation and g stands for gravity.....GRAVITATION is the force of attraction between any two bodies and GRAVITY is a special case if gravitation where one of the two bodies must be earth.

F=G.M.m / R^{2 ____1}

from Newton's 2nd law of motion,

F=m.g _________2

from equation 1 and 2,

g=G.M/R²