# Shared Flashcard Set

## Details

Physics Vocab and Concepts 1
Vocabulary terms and concepts for chapters 1-4, Physics 8e by Cutnell and Johnson
23
Physics
01/25/2011

Term
 scalar quantity
Definition
 a quantity without directionExample: Speed
Term
 vector quantity
Definition
 a quantity with magnitude and directionExample: Velocity
Term
 displacement
Definition
 the vector quantity whose magnitude represents the shortest distance between the initial and final points, and whose direction points from the initial point to the final point
Term
 average speed
Definition
 Total distance traveled divided by the change in time.
Term
 average velocity
Definition
 displacement divided by the change in time
Term
 average acceleration
Definition
 The change in velocity divided by the change in time
Term
 Instantaneous Velocity
Definition
 the rate of change of displacement
Term
 Instantaneous Acceleration
Definition
 the rate of change of velocity
Term
 Free Fall
Definition
 An idealized motion in which air resistance is neglected and acceleration is nearly constant. This acceleration is due to gravity and taken to be 9.80 m/s2 at the earth's surface
Term
 Force
Definition
 The push or pull required to change the state of motion of an object as defined by Newton's second law
Term
 Mass
Definition
 A quantitative measure of inertia
Term
 Free Body diagram
Definition
 a vector diagram that represents all of the forces acting on an object
Term
 inertia
Definition
 the natural tendency of an object to remain at rest or in uniform motion at constant speed in a straight line
Term
 gravitational force
Definition
 the force of attraction that every particle of mass in the universe exerts on every other particle
Term
 weight
Definition
 the gravitational force exerted by the earth on an object
Term
 normal force
Definition
 one component of the force that a surface exerts on an object with which it is in contact
Term
 friction
Definition
 the force that an object encounters when it moves or attempts to move along a surface
Term
 tension
Definition
 the tendency of a rope (or similar object) to be pulled apart due to the forces that are applied at either end
Term
 equilibrium
Definition
 the state an object is in if it has zero acceleration.
Term
 apparent weight
Definition
 The force that an object exerts on the platform of a scale.
Term
 Newton's First Law of Forces
Definition
 An object at rest or in a state of motion at a constant speed along a straight line tends to stay at rest. The sum of the forces equals 0
Term
 Newton's Second Law of Forces
Definition
 Force equals mass times acceleration
Term
 Newton's Third Law of Forces
Definition
 For every force, there exists an equal and opposite force
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