Question

24. As the Earth orbits the Sun, and the Moon orbits the Earth, they will align at a right angle every two weeks. What is the net gravitational force (magnitude and direction) on the Earth, from the Sun and Moon, in this mases of the Earth, Moon and Sun are 5.98 x 10^24 kg, 7.35 x 10^22 kg and 1.99 x 10^30kg respectively. The earth-Sun and Earth-Moon distances are
1.50 X 10^11 m and 3.84 x 10^8