Consider a satellite in a circular low mars orbit, 300 km above the planetary surface. use newton's law of universal gravitation and the concepts introduced in this section to answer the questions below. use the following quantities in your calculations and pay close attention to unit conversions. radius of mars: r=3396km mass of mars: m=6.419×1023kg universal gravitational constant: g=6.674×10−11m3/kg/s2 what is the orbital velocity of the satellite? g