The mass of the Earth is approximately 5.98 ✕ 10²⁴ kg, and the mass of the Moon is approximately 7.35 ✕ 10²² kg. The Moon and the Earth are separated by about 3.84 ✕ 10⁸ m.
(a) What is the magnitude of the gravitational force that the Moon exerts on the Earth? In N
b) If Serena is on the Moon and her mass is 39.7 kg, what is the magnitude of the gravitational force on Serena due to the Moon? The radius of the Moon is approximately 1.74 ✕ 10⁶ m. In N