How does gravity depend on mass?

If the body is at rest, then the force of gravity is equal to the product of its mass and the acceleration of gravity near a given planet (for example, the acceleration of gravity on Earth is often taken as 10 m / s ^ 2).
If the body moves upward with acceleration, then the force of gravity is equal to the product of its mass and the sum of the acceleration of gravity and the body’s own acceleration.
If the body is moving downward with acceleration, then the force of gravity is equal to the product of its mass and the difference between the acceleration of gravity and the body’s own acceleration.



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