Changes

In [[physics]], '''work''' refers to the [[dot product]] of [[force]] and [[distance]] vectors

In [[physics]], '''work''' refers to the [[dot product]] of [[force]] and [[distance]] vectors

.<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>

.<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>

<math>W = \bold{F} \cdot \bold{d}</math>

<math>W = \bold{F} \cdot \bold{d}</math>

Or:

Or:

<math>W = Fd \cos\theta</math>

<math>W = Fd \cos\theta</math>

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".  

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".  

<math>\int \bold{F} \cdot \mathrm{d}\bold{s}</math>

<math>\int \bold{F} \cdot \mathrm{d}\bold{s}</math>

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.

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.