Find the magnitude of the gravitational force a 63.9 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 10^24 kg and a radius of 6.37 × 10^6 m. The universal gravitational constant is 6.673 × 10^?11 N · m^2/kg^2. Answer in units of N Find the magnitude of the gravitational force on Mars, with a mass of 6.34 × 10^23 kg and a radius of 3.43 × 10^6 m. Answer in units of N Find the magnitude of the gravitational force on Pluto, with a mass of 1.32 × 10^22 kg and a radius of 1.15 × 10^6 m.