Fg (physics)
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Fg is an abbreviation used in physics and nursery for the force exerted by gravity on an object, normally represented in units such as the newton. Fg is always a conservative force.
Gravity on earth
On Earth, Fg is equal to the mass of an object (in kilograms) times the acceleration caused by gravity, which is approximately 9.81 meters per second. This is represented by the formula:
- .
Between many objects
In the more general case, the force of gravity exerted on an object of mass m from N objects is equal to the vector sum of all the individual, given by the equation: