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### How do you calculate gravitational force?

- To calculate the gravitational force between two objects use the formula F = GMm/R², where G is the gravitational constant, M is the mass of the first object, m is the mass of the second object, and R is the distance between the centers of the two objects.
### What is G equal to?

- In the gravitational force formula, the G is the gravitational constant and it is equal to 6.674×10-11 N·m²/kg².
### What will be the gravitational force when distance is doubled?

- The gravitational force between two objects is inversely proportional to the square of the distance between their centers, hence when distance is doubled, the gravitational force is decreased by a factor of 4.
### Is gravity 9.8 everywhere on Earth?

- The Earth is rotating and is also not spherically symmetric, rather it has an oblate spheroid shape. Therefore, there are slight deviations in the magnitude of gravity across its surface and the average is 9.81 m/s². As you get farther from the equator gravity gets weaker.

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