# Shared Flashcard Set

## Details

Chapter 6
Work and Energy
16
Physics
02/03/2015

Term
 SI unit for work
Definition
 joule (J); newton x meter
Term
 What two components must exist in order to do work?
Definition
 force AND displacement
Term
 If there is no displacement, is work actually being done?
Definition
 no!
Term
 The result of work is the change of _____ of an object
Definition
 kinetic energy
Term
 work-energy theorem
Definition
 work done by net external force = final kinetic energy - initial kinetic energy
Term
 SI unit of kinetic energy
Definition
 joule (J)
Term
 To what kind of work does the work-energy theorem not apply?
Definition
 work done by an individual force (unless that force is the only one present)
Term
 If the work done by the net force is _____, the kinetic energy of the object increases
Definition
 positive
Term
 If the work done is _____, the kinetic energy decreases
Definition
 negative
Term
 Can you use the same "work done by gravity" equation for any path taken between initial & final heights, not just for the straight-down path?
Definition
 yes!
Term
 Only the difference in _____ need to be considered when calculating the work done by gravity
Definition
 vertical distances
Term
 The greater the height "h", the greater is the gravitational _____
Definition
 potential energy
Term
 gravitational potential energy
Definition
 the quantity "m(g)(h)"; "PE"; the energy that an object of mass "m" has by virtue of its position relative to the surface of the earth; position is measured by height "h" of the object relative to an arbitrary zero level
Term
 The concept of potential energy is associated only with a type of force known as a _____ force
Definition
 conservative
Term
 SI unit of gravitational potential energy
Definition
 joule (J)
Term
 Is gravitational potential energy a scalar quantity or a vector quantity?
Definition
 scalar
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