friction - force that opposes motion and causes them to slow down, stop, or change direction when they rub against each other, gravity - A force that pulls objects toward each other, Earth pulls all objects towards the center of the Earth, force - a push or a pull, accelerate - to begin moving or speeding up, decelerate - to begin slowing down to come to a stop, mass - how much matter is in an object, Newton's Laws - the three fundamental laws Isaac Newton discovered that explains the motion of objects, air resistance - friction acting on an object as it moves through the air, water resistance - A frictional force on objects moving through water., contact forces - forces that have an effect only on objects that they touch, non contact force - a force that one object can apply to another object without touching it, applied force - a force which is applied to an object by a person or another object,

Force and Motion

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