# Shared Flashcard Set

## Details

Ch. 4-5 Vocab
forces
22
Physics
10/08/2007

Term
 force
Definition
 push/pull on object causing change in motion; has magnitude and direction
Term
 free-body diagram
Definition
 physical model representing forces acting on a system
Term
 net force
Definition
 vector sum of all forces on an object
Term
 Newton's second law
Definition
 acceleration of object proportional to net force and inversely proportional to mass of accelerating object
Term
 Newton's first law
Definition
 object at rest stays at rest, object in motion stays in motion in straight line at constant speed if net force on object is zero
Term
 inertia
Definition
 tendency of object to resist change
Term
 equilibrium
Definition
 net force on object is zero
Term
 apparent weight
Definition
 force experienced by object from all forces acting on it, giving object acceleration
Term
 weightlessness
Definition
 object's apparent weight of zero from no contact forces pushing up on it
Term
 drag force
Definition
 exerted by a fluid on object moving through it; depends on object's motion and properties and the fluid's properties
Term
 terminal velocity
Definition
 constant velocity of object reached when drag force equals force of gravity
Term
 interaction pair
Definition
 pair of forces equal in strength but opposite in direction
Term
 Newton's third law
Definition
 all forces come in pairs and act on different objects and equal in strength and opposite in direction
Term
 tension
Definition
 force exerted by a rope/string
Term
 normal force
Definition
 perpendicular contact force exerted by a surface on another object
Term
 components
Definition
 projections of the component vectors
Term
 vector resolution
Definition
 process of breaking a vector into its components
Term
 kinetic friction
Definition
 force exerted on one surface by a second surface when the two surfaces rub against each other because one or both of the surfaces has motion
Term
 static friction
Definition
 force exerted on one surface by second surface with no motion between the two surfaces
Term
 coefficient of kinetic friction
Definition
 slope of line between two surfaces, relating frictional force to normal force
Term
 equilibrant
Definition
 force placing object in equilibrium; same magnitude as resultant but opposite in direction
Term
 coefficient of static friction
Definition
 dimensionless constant depending on 2 surfaces in contact; used to calculate maximum static frictional force that needs to be overcome before motion begins
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