## Laws of Motion

##### Created by:

rbuchman  on November 3, 2009

##### Description:

Review of Ch 4 Vocab

##### Classes:

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# Laws of Motion

 first law of motiona body remains at rest or in motion with a constant velocity unless acted upon by an external force
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#### Definitions

first law of motion a body remains at rest or in motion with a constant velocity unless acted upon by an external force
inertia the tendency of an object to resist any change in its motion
gravity (physics) the force of attraction between all masses in the universe
second law of motion Newton's law that states force equals mass times acceleration
weight The measure of the force of gravity on an object
mass the amount of matter in an object
projectile motion the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth
centripetal acceleration acceleration of an object toward the center of a curved or circular path
centripetal force any force that causes an object to move in a circular path
third law of motion for every action there is an equal but opposite reaction
momentum the product of an object's mass and velocity
law of conservation of momentum momentum can be transferred between objects but the total momentum is never lost.

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