Question

derive an expression for aceleration due to gravity

Answer 1

we know that f is directly proportional to product of masses and indirectly proportional to the square of the distance between so f=Gm1m2/r^2
where G is the constant of proportionality
F=Gm1m2/r^2
from newton's second law
F=ma=mg
mg=Gm1m2/r^2
g=Gm/r^2

Answer 2

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