a push or pull upon an object resulting from the object's interaction with another object
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Net Force
the overall force acting on an object when all of the forces acting on it are combined
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Newton's First Law of Motion
a scientific law stating that objects at rest remain at rest, and objects in motion remain in motion with the same velocity, unless acted upon by an unbalanced force
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Inertia
the tendency of an object to resist changes in its velocity or resist changes to acceleration
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Newton's Second Law of Motion
a scientific law stating that the acceleration of an object increases with increased force and decreases with increased mass
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Centripetal Force
any force that keeps an object moving in a circle
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Contact Forces
a force generated by a push or pull. these include frictional, tension, normal, air resistance, applied, and spring forces
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Sliding Friction
the result of an object sliding across a surface
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Air Resistance Force
a special type of frictional force that acts upon objects as they travel through the air