Work - Revision history

PeterIceHockey: Maths formatting

2016-12-13T21:12:01Z

Maths formatting

Brians1: Formatting

2016-09-07T19:44:55Z

Formatting

DavidB4-bot: clean up & uniformity

2016-07-13T21:54:38Z

clean up & uniformity

GregG: work is a scalar quantity, not a vector

2012-06-08T02:40:03Z

work is a scalar quantity, not a vector

GregG: add magnitude signs; perhaps I should texify this paragraph...

2012-06-08T02:39:41Z

add magnitude signs; perhaps I should texify this paragraph...

GregG: change to magnitudes in second equation

2012-06-08T02:38:57Z

change to magnitudes in second equation

GregG: change link to article we have on scalar vector multiplication (the dot product)

2012-06-08T02:38:26Z

change link to article we have on scalar vector multiplication (the dot product)

Aschlafly: Reverted edits by RICHhz (Talk) to last revision by Sunda62

2010-04-30T15:17:54Z

Reverted edits by RICHhz (Talk) to last revision by Sunda62

RICHhz: Replaced content with 'Here is a clue to a guild member'

2010-04-30T15:15:39Z

Replaced content with 'Here is a clue to a guild member'

Sunda62: Changing order of text + aberrant unit kWh

2010-04-12T01:14:39Z

Changing order of text + aberrant unit kWh

@@ Line 2: / Line 2: @@
 .<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>
-<math>W = \bold{F} \cdot \bold{d}</math>
+<math>W = \vec{F} \cdot \vec{d}</math>
 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 <math>\vec{a} \cdot \vec{b}</math> (read "a dot b") can be rewritten as <math>|\vec{a}| |\vec{b}| \cos{\theta}</math>.
 When the force is not constant, the correct expression uses [[integration]]:
-<math>\int \bold{F} \cdot \mathrm{d}\bold{s}</math>
+<math>\int \vec{F} \cdot \mathrm{d}\vec{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 <math>W</math> is positive, there is a transfer of energy ''to'' the system, and if <math>W</math> 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]]. The aberrant unit kWh (kilowatt-hour) is sometimes used; this unit is the product of kilowatt, or 1,000 Watts (Joules per second), and hour, or 3,600 seconds.

@@ Line 1: / Line 1: @@
 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>
 <math>W = \bold{F} \cdot \bold{d}</math>
 Or:
 <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".
@@ Line 19: / Line 13: @@
 <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.

@@ Line 1: / Line 1: @@
 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>
 <br>
@@ Line 28: / Line 28: @@
 ==References==
 <references/>
-[[category:physics]]
+[[Category:Physics]]
 [[Category:Mechanics]]

@@ Line 4: / Line 4: @@
 <br>
-<math>\bold{W} = \bold{F} \cdot \bold{d}</math>
+<math>W = \bold{F} \cdot \bold{d}</math>
 <br>
@@ Line 10: / Line 10: @@
 Or:
-<math>\bold{W} = Fd \cos\theta</math>
+<math>W = Fd \cos\theta</math>
 <br>

@@ Line 14: / Line 14: @@
 <br>
-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".
 When the force is not constant, the correct expression uses [[integration]]:

← Older revision		Revision as of 02:38, June 8, 2012
Line 1:		Line 1:
−	In [[physics]], '''work''' refers to the [[~~scalar~~ 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>.

← Older revision		Revision as of 15:17, April 30, 2010
Line 1:		Line 1:
−	~~Here~~ is a ~~clue~~ to a ~~guild member~~	+	In [[physics]], '''work''' refers to the [[scalar product]] of [[force]] and [[distance]] vectors
		+	<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>.
		+
		+	<br>
		+
		+	<math>\bold{W} = \bold{F} \cdot \bold{d}</math>
		+
		+	<br>
		+
		+	Or:
		+
		+	<math>\bold{W} = \bold{F} \cdot \bold{d} \cos\theta</math>
		+
		+	<br>
		+
		+	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".
		+
		+	When the force is not constant, the correct expression uses [[integration]]:
		+
		+	<math>\int \bold{F} \cdot \mathrm{d}\bold{s}</math>
		+
		+	<br>
		+
		+	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]]. The aberrant unit kWh (kilowatt-hour) is sometimes used; this unit is the product of kilowatt, or 1,000 Watts (Joules per second), and hour, or 3,600 seconds.
		+
		+	==References==
		+	<references/>
		+	[[category:physics]]
		+	[[Category:Mechanics]]

← Older revision		Revision as of 15:15, April 30, 2010
Line 1:		Line 1:
−	~~In [[physics]], '''work''' refers to the [[scalar product]] of [[force]] and [[distance]] vectors~~	+	Here is a clue to a guild member
−	~~<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>.~~
−
−	~~<br>~~
−
−	~~<math>\bold{W} = \bold{F} \cdot \bold{d}</math>~~
−
−	~~<br>~~
−
−	~~Or:~~
−
−	~~<math>\bold{W} = \bold{F} \cdot \bold{d} \cos\theta</math>~~
−
−	~~<br>~~
−
−	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".
−
−	~~When the force is not constant, the correct expression uses [[integration]]:~~
−
−	~~<math>\int \bold{F} \cdot \mathrm{d}\bold{s}</math>~~
−
−	~~<br>~~
−
−	~~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]]. The aberrant unit kWh (kilowatt-hour) is sometimes used; this unit is the product of kilowatt, or 1,000 Watts (Joules per second), and hour, or 3,600 seconds.
−
−	~~==References==~~
−	~~<references/>~~
−	~~[[category:physics]]~~
−	~~[[Category:Mechanics]]~~