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What is difference between gravitational force and magnetic force?

Answer 1

Gravity is relatively weaker, is a result of mass and acts on all things that have mass.
Magnetic force is relatively stronger, is a result of interaction of photons(charged particles) and acts on things that contain iron(ferrous) or have a charge on them.

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Answer 2

John Alexander

Gravitational force is the attractive force between two masses, while magnetic force is the force exerted between magnetic poles or moving charges. Gravitational force depends on the masses of the objects and the distance between them, while magnetic force depends on the strength of the magnets or the velocity of the moving charges and the distance between them. Gravitational force is always attractive and acts on all objects with mass, while magnetic force can be attractive or repulsive and acts only on objects with magnetic properties or moving charges.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.