# Shared Flashcard Set

## Details

Key Terms and Vocabulary
physics exam study guide
37
Physics
01/21/2011

Term
 Acceleration
Definition
 the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
Term
 Acuracy
Definition
 a description of how close a measurement is to the correct or accepted value of the quantity measured
Term
 Average Velocity
Definition
 the total displacement divided by the time interval during which the displacement occured
Term
 Centripetal Acceleration
Definition
 the acceleration directed toward the center of a circular path
Term
 Coefficient of Friction
Definition
 the ration of the magnitude of the force of friction between two objects in contact to the magnitude of the normal force with which the objects press against each other
Term
 Components of a Vector
Definition
 the projections of a vector along the axes of a coordinate system
Term
 Controlled Experiment
Definition
 an experiment that tests only one factor at a time by using a comparison of a control group with an experiment group
Term
 Displacement
Definition
 the change in position of an object
Term
 Elastic Potential Energy
Definition
 the energy available for use when an elastic body returns to its original configuration
Term
 Equilibrium
Definition
 in physics, the state in which the net force on an object is zero
Term
 Force
Definition
 an action exerted on an object which may change the object's state of rest or motion; force has magnitude and direction
Term
 Frame of Reference
Definition
 a system for specifying the precise location of objects in space and time
Term
 Free Fall
Definition
 the motion of a body when only the force due to gravity is acting on the body
Term
 Gravitational Potential Energy
Definition
 the potential energy stored in the gravitational fields of interacting bodies
Term
 Hypothesis
Definition
 an explanation that is based on prior scientific research or observations and that can be tested
Term
 Inertia
Definition
 the tendency of an object to resist beign moved or, if the object is moving, to resist a change in speed or direction
Term
 Instantaneous Velocity
Definition
 the velocity of an object at some instant or at a specific point in the object's path
Term
 Kinetic Energy
Definition
 the energy of an object that is due to the object's motion
Term
 Kinetic Friction
Definition
 the force that opposes the movement of two surfaces that are in contact and are sliding over each other
Term
 Mechanical Energy
Definition
 the sume of kinetic energy and all forms of potential energy
Term
 Model
Definition
 a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
Term
 Net Force
Definition
 a single force whose external effects on a rigid body are the same as the effects of several actual forces acting on the body
Term
 Normal Force
Definition
 a force that acts on a surface in a direction perpendicular to the surface
Term
 Potential Energy
Definition
 the energy associated with an object because of the postion, shape, or condition of the object
Term
 Power
Definition
 a quantity that measures the rate at which work is done or energy is transformed
Term
 Precision
Definition
 the degree of exactness of a measurement
Term
 Projectile Motion
Definition
 the curved path that an object follows when thrown, launched, or otherwise projected near the surface of the Earth
Term
 Resultant
Definition
 a vector that represents the sum of two or more vectors
Term
 Scalar
Definition
 a physical quantity that has magnitude but no direction
Term
 Significant Figures
Definition
 those digits in a measurement that are known with certainty plus the first digit that is uncertain
Term
 Spring Constant
Definition
 the energy available for use when a deformed object returns to its original configuration
Term
 Static Friction
Definition
 the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest
Term
 System
Definition
Term
 Vector
Definition
Term
 Weight
Definition
Term
 Work
Definition
Term
 Work-Kinetic Energy Theorem
Definition
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