Tidal forces are gravitational forces exerted on different parts of a body by a second body. their effects are particularly visible on the earth's surface in the form of tides. to understand the origin of tidal forces, consider the earth-moon system to consist of two spherical bodies, each with a spherical mass distribution. let re be the radius of the earth, m be the mass of the moon, and g be the gravitational constant.
1) earth is subject not only to the gravitational force of the moon but also to the gravitational pull of the sun. however, earth is much farther away from the sun than it is from the moon. in fact, the center of earth is at an average distance of 1.5×1011m from the center of the sun. given that the mass of the sun is 1.99×1030kg, which of the following statements is correct?

a) the force exerted on earth by the sun is weaker than the corresponding force exerted by the moon.
b) the force exerted on earth by the sun is stronger than the corresponding force exerted by the moon.
c) the force exerted on earth by the sun is of the same order of magnitude of the corresponding force exerted by the moon.