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level: Vocabulary

Questions and Answers List

level questions: Vocabulary

QuestionAnswer
FrictionA force that opposes motion, resulting from the contact of two surfaces.
Newton's first law (The Law of Inertia)An object in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force.
Newton's Second LawWhen an object is acted on by one or more outside forces, the vector sum of those forces is equal to the mass of the object times the resulting acceleration vector.
Normal ForceA force that results from the contact of two bodies and is perpendicular to the surface of contact.
Kinetic frictionFriction that opposes motion once the motion has already started.
Static frictionFriction that opposes the initiation of motion.