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This acceleration is typically denoted as "g" and has an approximate value of 9. 8 m/s^2 on the surface of the Earth. It is the rate at which the speed of a freely falling object increases due to gravity. The gravitational acceleration is determined by the mass and radius of the celestial body around which the object is falling. For example, the value of g on the Moon is approximately 1. 6 m/s^2, while on Jupiter it is around 24. 8 m/s^2. Gravitational acceleration plays a crucial role in various fields such as physics, engineering, and space exploration. It is used in calculations involving free-falling objects, projectile motion, and the motion of celestial bodies. It also affects the weight of an object, as weight is equal to mass multiplied by the gravitational acceleration. The concept of gravitational acceleration was first explained by Isaac Newton in his theory of universal gravitation. According to this theory, every particle of matter in the universe attracts every other particle with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them. Overall, the Wikipedia page on gravitational acceleration provides a comprehensive overview of this fundamental concept in physics and its applications in various fields.