Question

Some people say that the tides on Earth are caused by the pull of the moon. Is this statement true?

1. Determine the forces that the moon and the sun exert on a mass, m, of water on Earth. Your answer will be in terms of m with units of N.

2.Which celestial body, the sun or the moon, has a greater pull on the waters of Earth?

Answer 1

here your sollutions !

a. Determine the forces that the moon and the sun exert on a mass, m, of water on Earth. Your answer will be in terms of m with units of N.

F_s,m= 6.67 x 10^-11 Nm²/ kg²[ (1.99 x 10³⁰kg)(m) / (1.5x10¹¹m)²]

       = 5.9 x 10^-3 N m

F_m,m = 6.67 x 10^-11 Nm² / kg². [ (7.36 x10²² kg)(m) / (3.8 x10⁸ m)²]

       = 3.4 x 10^-5 N m

b.Which celestial body, the sun or the moon, has a greater pull on the waters of Earth?

The sun pulls approximately 100 times stronger on the waters of Earth.