# Shared Flashcard Set

## Details

Physics Terms
definitions on chapter 4 terms
17
Physics
11/10/2013

Term
 Newton's First Law
Definition
 "An object that is at rest will remain at rest, and an object that is moving will continue to move in a straight line with constant speed, if and only if the net force acting on the object is zero."
Term
 force
Definition
 A push or pull.
Term
 interaction pair
Definition
 two forces that are in opposite directions, have equal magnitudes, and act on different objects.
Term
 Tension
Definition
 a force exerted by any segment of a rope or string on an adjoining segment.
Term
 net force
Definition
 the vector sum of two or more forces acting on an object.
Term
 equilibrium
Definition
 if the net force on an object is zero
Term
 Newton's Second Law
Definition
 F=ma   "The acceleration of an object is directly proportional to the net force on it and inversely proportional to its mass."
Term
 apparent weight
Definition
 The supporting force acting upon the object.
Term
 Contact Force
Definition
 A force that acts on an object by touching it
Term
 Newton's 3rd Law
Definition
 "The two forces in an interaction pair act on different objects and are equal in magnitude and opposite in direction."
Term
 normal force
Definition
 A perpendicular contact force exerted by a surface on another object
Term
 Inertia
Definition
 The tendency of an object to resist changes in its motion
Term
 free-body diagram
Definition
 a dot represents an object and arrows represent each force acting on it, with their tails on the dot and their points indicating the direction of the force.
Term
 terminal velocity
Definition
 The constant velocity that a falling object reaches when the drag force equals the gravitational force
Term
 weightlessness
Definition
 when an object's apparent weight is zero, the object is in a state of ____.
Term
 gravitational field
Definition
 The vector quantity that relates an object's mass to the gravitational force it experiences at a given location.
Term
 Weight
Definition
 the gravitational force experienced by an object.
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