# Shared Flashcard Set

## Details

Physics vocab ch. 4
forces & laws of motion
16
Physics
10/03/2006

Term
 Dynamics
Definition
 a branch of mechanics that studies the effects of forces on motion of objects
Term
 Newton's 1st law of dynamics
Definition
 an object at rest tendsto remain at rest, and an object in motion tends to remain in unform motion along a straight line
Term
 Inertia
Definition
 the natural tendency of objects to remain at rest or in unifom motion at a constant velocity
Term
 Mass
Definition
 a physical quantity that is the measure of inertial and gravitational properites of matter and also total energy of an object
Term
 Force
Definition
 a vector quantity that corresponds to any action of one object on another object
Term
 Net force
Definition
 resultant force acting on an object
Term
 Newton's 2nd Law of Dynamics
Definition
 net force acting on an object is equal to the product fo mass of an object, and an object's acceleration produced by net force.
Term
 Newton's 3rd Law
Definition
 for every action there is a equal but opposite reaction
Term
 Weight
Definition
 gravitional force ecerted on an object by any large body ( Earth )
Term
 Normal force
Definition
 force in which a suppoting surface acts on an object. A normal force is directed normal or perpendicular to teh supporting surface
Term
 Tension
Definition
 a reaction force set up in a body that is subjected to stress
Term
 Frictional force
Definition
 the force that opposes the relative motion of two bodies
Term
 Coefficent fo friction
Definition
 a coefficient of proportionality between a frictional force and normal force acting on an obj.
Term
 Line of force
Definition
 img. line along which there is the action of the force
Term
 Statics
Definition
 branch of mechanics that studies equilibrium of physical bodies
Term
 1st condition fo equilibrium
Definition
 the state of an obj. in which it has zero acceleration b/c of net force on an obj. equals zero. SUB types :1) static equilibrium ( when bosy is at rest) 2) translational equilibriumk ( when body is in uniform motion with a constant velocity
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