Are gravitational waves involved?

Let the gravitation field of part 1 be 1000 units and that of part 2 be E. Let the plane make an angle $60 ^ \circ$ with the vertical plane. Find $\lfloor E \rfloor$ .

Clarifications :

• $AB$ is one of the diameter and is in the horizontal plane.

• The dotted line other than $AB$ denotes the vertical plane.

• The figure is a solid hemisphere.