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Forces and Newton\'s Laws
1) Forces cause motion or changes in motion. They are represented by arrows with length proportional to magnitude. Newton's laws describe how forces affect motion. 2) Newton's Second Law states that applying a net force to an object will cause it to accelerate in the direction of the force, proportional to the force and inversely proportional to the object's mass. 3) Gravity is an attractive force between any two masses. On Earth, it gives weight to objects and causes things to fall. Gravitation depends on mass and distance between objects.
