Difference between revisions of "Work"
Jump to navigation
Jump to search
(Replacing page with 'Server Error 404- Page Not Found') |
m (Reverted edits by StinkyCheese9 (Talk); changed back to last version by Sandalphon) |
||
| Line 1: | Line 1: | ||
| − | + | In [[physics]], work refers to the product of [[force]] and [[distance]] vectors | |
| + | <ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>. | ||
| + | |||
| + | ''W'' = F · d | ||
| + | |||
| + | Or: | ||
| + | |||
| + | ''W'' = F d cos θ | ||
| + | |||
| + | Where θ is the angle that separates the vectors. The second form of the equation is the expanded form of the "dot product" in the first equation. In physics, the dot product "a · b" (read "a dot b") can be rewritten as "a b cos θ". | ||
| + | |||
| + | Work is a transfer of [[energy]]; if ''W'' is positive, there is a transfer of energy ''to'' the system, and if ''W'' is negative there is a transfer of energy ''from'' the system. | ||
| + | |||
| + | Its units are that of force multiplied by distance, in SI this is [[newton (unit)|Newton]] · [[Meter]], or [[Joule]] | ||
| + | |||
| + | ==References== | ||
| + | <references/> | ||
| + | [[category:physics]] | ||
| + | [[Category:Mechanics]] | ||
Revision as of 21:25, April 15, 2008
In physics, work refers to the product of force and distance vectors [1].
W = F · d
Or:
W = F d cos θ
Where θ is the angle that separates the vectors. The second form of the equation is the expanded form of the "dot product" in the first equation. In physics, the dot product "a · b" (read "a dot b") can be rewritten as "a b cos θ".
Work is a transfer of energy; if W is positive, there is a transfer of energy to the system, and if W is negative there is a transfer of energy from the system.
Its units are that of force multiplied by distance, in SI this is Newton · Meter, or Joule
References
- ↑ Serway and Beichner, Physics for Scientists and Engineers, Fifth Edition