jshaner858 said:1) if something is 5 Earth radii above the Earth's surface and you know its mass, how would you figure out force of gravity on it?
2)and given the radius and mass of a planet how would you be able to figure out the acceleration due to gravity on it?
Universal gravitation is a scientific principle that explains the force of attraction between all objects with mass in the universe. It states that every object in the universe exerts a force of attraction on every other object, and this force is directly proportional to the masses of the objects and inversely proportional to the square of the distance between them.
The concept of universal gravitation was first proposed by Sir Isaac Newton in the 17th century. He published his theory in his famous work Principia in 1687.
Universal gravitation is responsible for the force of gravity, which is what keeps objects on Earth from floating away into space. The mass of the Earth creates a gravitational pull that keeps objects, including humans, on its surface. It also affects the motion of objects, such as the orbit of the Moon around the Earth and the orbit of the Earth around the Sun.
No, universal gravitation applies to all objects with mass, regardless of their location in the universe. This means that it also affects objects on Earth, such as the force of gravity between two people standing next to each other.
Einstein's theory of relativity expanded upon Newton's theory of universal gravitation by explaining that gravity is not just a force between objects, but rather the curvature of spacetime caused by the presence of mass. This means that the more massive an object is, the more it curves the fabric of spacetime, causing other objects to be attracted to it. Einstein's theory also explains the behavior of gravity in extreme conditions, such as near black holes.