Newton's law of universal gravitation states that every object in the universe attracts every other object by a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The acceleration due to gravity on Earth is approximately 9.8 m/s2. The moon revolves around the Earth due to the centripetal force of Earth's gravity. If this force ceased, the moon would travel in a straight line tangent to its orbit.