For two point masses and

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

For two point masses

m_1

and

m_2

, a straight-line graph is obtained by plotting gravitational force

F

(vertical axis) against

1/r^{2}

(horizontal axis). If the slope of this line is

S

, derive an expression for the universal gravitational constant

G

in terms of

S

m_1

and

m_2