Find the magnitude of the gravitational force a 66.6 kg person?

Question

find the magnitude of the gravitational force a 66.6 kg person would experience while standing on the surface of Earth with a mass of 5.98x10^24 kg and a radius of 6.37 x 10^6m. The universal gravitational constant is 6.673x10^-11 N*m^2/kg^2. Answer in units of N.

Find the magnitude of the gravitational force on Mars, with a a mass of 6.34x10^23 kg and a radius of 3.43x10^6m. answer in units of N.

Find the magnitude of the gravitational force on pluto with a mass of 1.32x10^22 kg and a radius of 1.15x10^6m. Answer in units of N.

Answer 1

F=GMm/R^2
F=6.673x10^-11 * 5.98x10^24 * 66.6 / (6.37 x 10^6)^2
F=654.96N