What approximations or simplifying assumptions must you make in these calculations? (note: some of these choices are false because they are wrong physics! ) entry field with incorrect answer treat mars as though it were spherically symmetric. ignore the effects of the sun, which alters the gravitational force that one object exerts on another. treat the humans as though they were points or uniform-density spheres. use the same gravitational constant in (a) and (b) despite its dependence on the size of the masses.