Answer: The correct answer is F=249.82N.
Step-by-step explanation:
The expression for the gravitational force is as follows:
[tex]F=\frac{GMm}{r^{2}}[/tex]
Here, M, m are the masses, G is the universal gravitational constant and r is the distance between masses.
It is given in the problem that a person having mass 68.5 kg experience a force while standing on the surface of mars.
Put m= 68.5 kg, [tex]r=3.43\times 10^{6} m[/tex], [tex]G=6.67\times 10^{-11} N m^{2} kg^{-2}[/tex] and [tex]M=6.43\times 10^{23} kg[/tex] in the above expression.
[tex]F=\frac{(6.67\times 10^{-11})(6.43\times 10^{23})(68.5)}{(3.43\times 10^{6})^{2}}[/tex]
F=249.82 N
Therefore, the correct answer is F=249.82 N.
