# Shared Flashcard Set

## Details

Section 2 Newton's First Law - Inertia
Vocabulary Section 2 Newton's First Law - Inertia
10
Physics
06/30/2011

Term
 friction
Definition
 The force that acts to resist the relative motion (or attempted motion) of objects or materials that are in contact.
Term
 inertia
Definition
 The property of any body to resist changes in its state of motion.  Mass is the measure of inertia.
Term
 inverse-square law
Definition
 A physical quantity varies inversely as another quantity squared.  Example:  Illumination varies inversely as the square of the distance from the source.
Term
 kilogram
Definition
 The fundamental SI unit of mass.  One kilogram (symbol kg) is the amount of mass in one liter of water at 4 °C.
Term
 Law of inertia
Definition
 Every body continues in its state of rest, or of motion in a straight line at constant speed, unless acted upon by a nonzero force.  Also known as Newton's first law.
Term
 Law of universal gravitation
Definition
 For any pair of objects, each object attracts the other object with a force that is directly proportional to the product of the masses of the objects, and inversely proportional to the square of the distance between their centers of mass
Term
 mass
Definition
 A measure of an object's inertia; also a measure of the amount of matter in an object.  Depends only on the amount of and kind of particles that compose an object-not on its location (as weight does).
Term
 Newton
Definition
 SI unit of force.  One newton (N) is the force applied to a one-kilogram mass that will produce an acceleration of one meter per second per second.
Term
 Universal gravitational constant
Definition
 The constant G in the equation for Newton's law of universal gravitation; measures the strength of gravity.
Term
 weight
Definition
 The force on a body due to the gravitational attraction of another body (commonly Earth).
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