Physics Gravitation Level: Misc Level

(a) Calculate, using Newton s law of gravity, the size of the force of attraction between the Earth and a mass of 5.0 kg on the Earth. Data: Distance to the center of Earth from the surface =6370 km.Mass of Earth = 5.98 10 24 kg. Gravitational constant (G =6.67 times 10-11 Nm^2 /kg^2).

(b) Calculate, using Newton s law of gravity, size of the force of attraction between the moon and a mass of 5.0 kg on the earth surface nearest the moon. Data: Distance to the moon from surface of the earth =376,000 km. Mass of moon =7.36 times 10 22 kg.