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Gravity has always been a fascinating force that keeps us grounded and also makes us feel like we are being pulled apart by an invisible string. However, have you ever wondered how this force works? In this article, we will explore the history of gravity, its practical applications using Newton’s law of gravitation, and some real-world examples.

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1) History of Gravity The ancient philosophers pondered over falling objects but their theories were ridiculous. For instance, Brahmagupta believed that rocks have an affinity for earth. However, it wasn’t until the 17th century when Sir Isaac Newton came up with his law of gravitation which explained how gravity works.

2) Newtons Law of Gravitation This equation is used to calculate the force between two objects based on their masses and distance apart. The formula for this calculation is F = Gm1m2/r^2, where F represents the force in newtons (N), m1 and m2 represent the masses of the two objects in kilograms (kg), r represents the distance between them in meters (m), and G is a constant value known as the gravitational constant which is 6.67 x 10^-11 Nm^2/kg^2.

3) Calculations Let’s take an example to illustrate how this equation works. Suppose we have two objects, each with a mass of 5 kg and they are separated by a distance of 2 meters. Using the formula above, the force between them would be: F = (6.67 x 10^-11 Nm^2/kg^2) [(5)(5)] / (2)^2 = 3.34 x 10-9 N.

4) Real-World Applications Newton’s law of gravitation has been used to study everything from planets and moons to black holes and neutron stars. For instance, scientists use this equation to calculate the orbits of celestial bodies around each other. However, measuring gravity on a moving spacecraft is not as easy as it sounds because there are many factors that can affect its accuracy such as air resistance and magnetic fields.