The weight of an object is given by
[tex]F=mg[/tex]
where m is the mass of the object, while g is the strength of the gravity (which corresponds to the gravitational acceleration of the planet).
In our problem, the shoes have a mass of m=0.5 kg, and their weight is F=11.55 N. So, we can re-arrange the previous formula to find the value of g:
[tex]g= \frac{F}{m}= \frac{11.55 N}{0.5 kg}=23.1 N kg^{-1} [/tex]
and this is the strength of the gravity on Jupiter's surface.
