# Shared Flashcard Set

## Details

Physics Vocab
Physics Vocan Chapter 4
15
Physics
10/04/2014

Term
 force
Definition
 a push or pull exerted on an object. Causes objects to speed up, slow down, or change direction.
Term
 free- body diagram
Definition
 a physical model which presents the forces acting on a system. dot represents object. force represented with arrows signifying direction. Lastly choose a direction to be positive and indicate this off the side of the diagram.Usually select positive direction to be in the direction of the greatest amount of force. Makes it easier to solve by reducing number of negative values in calculation.
Term
 net force
Definition
 the vector sum of all the forces of an object.~when the forces are in opposite directions, the resulting vector is the length of the difference between the two vectors.
Term
 Newton's Second Law
Definition
 acceleration = Force(net) / mass~the acceleration of an object is equal to the sum of the forces acting on the object, divided by the mass of the object.
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 that object is zero.
Term
 Inertia
Definition
 the tendency off an object to resist change.(part of Newton's First Law)
Term
 Equilibrium
Definition
 when the net force of an object is zero.Occurs at rest (V=0) or when moving at constant velocity.
Term
 Apparent Weight
Definition
 the force an object experiences as a result of all the forces acting on it, giving the object an acceleration.
Term
 Weightlessness
Definition
 a=-gno contact forces pushing on the object and the object's apparent weight is zero.
Term
 Drag force
Definition
 the force exerted by a fluid on the object moving through the fluid. Dependent on the motion of the object, the properties of the object, and the properties of the fluid that the object is moving through
Term
 Terminal Velocity
Definition
 the constant velocity that is reached when the drag force equals the force of gravity.no net force- no acceleration
Term
 Interaction Pair
Definition
 two forces that are in opposite directions and have equal magnitude.
Term
 Newton's Third Law
Definition
 all forces come in pairs.
Term
 Tension
Definition
 the force exerted by a string or rope.
Term
 Normal Force
Definition
 the perpendicular contact force exerted by a surface on another object.
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