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asp 4-A DYNAMICS

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WORDS TO KNOW
DEFINITIONS
Centripetal force   An inward perpendicular force that causes an object to move in a circle  
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Friction   The resistance one object feels when it is in contact with another  
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Net force   The force that is left when all forces acting on a body are taken into consideration  
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Newton (N)   The unit for force; equal to the mass of an object times its acceleration (Kg . m/s2)  
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Perpendicular   A line or ray that meets another at a ninety (90) degree angle  
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Principle of inertia   The resistance of a body to a change in its state of rest or motion  
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Reaction   The response to an action  
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Rotational inertia   The tendency for a rotating object to remain at rest or in motion  
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Torque   A force that causes rotation; equal to mass times length of the radius  
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