Is d=r=0.5m or d=2r, so r=0.25m for Gravitational Potential Energy?

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SUMMARY

The discussion centers on the relationship between distance (d) and radius (r) in the context of gravitational potential energy calculations. The correct interpretation is that d equals r, specifically d = r = 0.5 m, leading to the conclusion that r must be 0.25 m when considering the equation for gravitational potential energy. This clarification resolves the confusion regarding whether d should be represented as 2r.

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Andrei0408
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Homework Statement
Find the gravitational potential energy of a body with the mass m1=70g in the gravitational field of a body with mass m2=60g placed at d=0,5 m. The universal gravitational constant is K=6,67∙10 ^ -11 N * m^2 / kg^2
Relevant Equations
Epg = -K * M*m / r
I know I just have to replace in the equation, I just want to know, is d=r=0.5 m or is d=2r, so r = 0.25 m ?
 
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Andrei0408 said:
d=r=0.5 m
This one seems to be correct.
 
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Thanks!
 
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