# Shared Flashcard Set

## Details

Chapter 6 (Exam 2)
Work and Energy
14
Physics
02/09/2015

Term
 conservative force
Definition
 a force in which the work it does on a moving object is independent of the path between the object's initial & final positions; a force which does no net work on an object moving around a closed path, starting & finishing at the same point
Term
 The kind of path which begins & ends at the same place is called a _____ path
Definition
 closed
Term
 The concept of _____ is not defined for a non-conservative force
Definition
 potential energy
Term
 Is friction a conservative or a non-conservative force?
Definition
 non-conservative
Term
 Is gravity a conservative or a non-conservative force?
Definition
 conservative
Term
 total mechanical energy "E"
Definition
 the sum of kinetic energy & potential energy
Term
 If no non-conservative forces act on an object, the total mechanical energy _____
Definition
 remains constant all along the path between the initial & final points
Term
 A quantity that remains constant throughout motion is said to be _____
Definition
 conserved
Term
 principle of conservation of mechanical energy
Definition
 the fact that the total mechanical energy is conserved when "Wnc" = 0J
Term
 power
Definition
 incorporates both the concepts of work & time; work done per unit time; average rate at which work "W" is done; denoted "P bar"
Term
 SI unit of power
Definition
 joule/s = watt (W)
Term
 Is power a scalar or a vector?
Definition
 scalar
Term
 the principle of conservation of energy
Definition
 energy can neither by created nor destroyed, but can only be converted from one form to another
Term
 The work done by a variable force in moving an object is equal to _____
Definition
 the area under the graph of:F(cos "theta") versus "s"
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