Gravitational Force:

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On Earth, gravitational force causes objects to accelerate at 9.8m/s2 towards the ground.

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Gravitational Force:

On Earth, gravitational force causes objects to accelerate at 9.8m/s2 towards the ground.

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Normal Force:

A supporting force exerted by a surface, perpendicular to it.(inertia)

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Frictional Force:

o Opposes motion between surfaces in contact. o Static Friction: Prevents motion. o Kinetic Friction: Opposes motion once an object is moving.Friction depends on the nature of the surfaces and the normal force but not on the contact area.

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Air Resistance

A form of friction when objects move through air. o Increases with speed and surface area.

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