Force of Gravity: This term refers to the specific force exerted by gravity on an object. It is equal to the product of an object's mass and acceleration due to gravity.
Weight is a measure of the force of gravity acting on an object. It depends on both an object's mass and its location in a gravitational field.
Universal Law of Gravitation: This law states that every particle in the universe attracts every other particle with a force directly proportional to their masses and inversely proportional to the square of their distance apart.