The force that acts against gravity is the buoyant force.
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An object is stationary until a force acts on it, then when a
force acts on it it will keep going the same direction and speed
forever, until another force acts on it.
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I think it might be electrostatic force! This is the force that
acts between the particles!
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The force which acts is the electrostatic force.
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Gravitational force acts on all objects, meaning ALLmatter.