Fill in the blank.

A. If the orbital radius of an object is doubled, the acceleration of that object toward the center BLANK . If the Kepler constant of a system is doubled, the acceleration of an object toward the center BLANK.

B. The gravitational pull of Sun on Earth can be treated like a pull on a "point" OR "cube" in space containing the mass of Earth because the increased force on every bit of mass that is closer to the Sun is "canceled by", "increased by" OR "multiplied by" the decreased force on every bit of mass that is farther from the Sun.