Just plug in
F = Gmm/r^2 = G*(17300/g)(3260/g)/19.4^2
You know G and g, so fill them in.
On earth, two parts of a space probe weigh 17300 N and 3260 N. These parts are separated by a center-to-center distance of 19.4 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far from any other objects.
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