https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&feed=atom&action=history
Conservation of momentum - Revision history
2024-03-28T15:43:12Z
Revision history for this page on the wiki
MediaWiki 1.39.5
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337069&oldid=prev
imported>Mark Widmer: Added additional remark about external forces.
2021-10-10T15:00:07Z
<p>Added additional remark about external forces.</p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'''<del style="font-weight: bold; text-decoration: none;">Momentum </del>is always conserved.''' The momenta of individual objects in a system may vary, but<del style="font-weight: bold; text-decoration: none;">, in the absence of any external forces, </del>the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">In the absence of external forces, </ins>'''<ins style="font-weight: bold; text-decoration: none;">momentum </ins>is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change <ins style="font-weight: bold; text-decoration: none;">if there are no external forces exerted on the objects in the system</ins>. Therefore, momentum is said to be conserved.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If an external force -- that is, a force exerted by an object outside the system -- is exerted on any objects within the system, then the total momentum will change.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If an external force -- that is, a force exerted by an object outside the system -- is exerted on any objects within the system, then the total momentum will change.</div></td></tr>
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imported>Mark Widmer
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337072&oldid=prev
imported>Mark Widmer: Added remarks about external forces.
2021-10-10T02:43:25Z
<p>Added remarks about external forces.</p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>'''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but<ins style="font-weight: bold; text-decoration: none;">, in the absence of any external forces, </ins>the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved<ins style="font-weight: bold; text-decoration: none;">.</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">If an external force -- that is, a force exerted by an object outside the system -- is exerted on any objects within the system, then the total momentum will change</ins>.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a glancing collision between two objects is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1}V_\mathrm{1f}\right) + \left(M_\mathrm{2}V_\mathrm{2f}\right)</math></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a glancing collision between two objects is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1}V_\mathrm{1f}\right) + \left(M_\mathrm{2}V_\mathrm{2f}\right)</math></div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td></tr>
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imported>Mark Widmer
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337070&oldid=prev
imported>Milton Beychok: Conservation of Momentum moved to Conservation of momentum: To change M to m in "momentum"
2010-03-16T20:11:47Z
<p><a href="/wiki/Conservation_of_Momentum" class="mw-redirect" title="Conservation of Momentum">Conservation of Momentum</a> moved to <a href="/wiki/Conservation_of_momentum" title="Conservation of momentum">Conservation of momentum</a>: To change M to m in "momentum"</p>
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imported>Milton Beychok
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337073&oldid=prev
imported>David E. Volk at 21:02, 23 December 2007
2007-12-23T21:02:19Z
<p></p>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{subpages}}</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved.</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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imported>David E. Volk
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337074&oldid=prev
imported>Jake Gaylor at 19:57, 15 November 2007
2007-11-15T19:57:11Z
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div></td></tr>
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imported>Jake Gaylor
https://citizendium.org/wiki/index.php?title=Conservation_of_momentum&diff=337071&oldid=prev
imported>Jake Gaylor: New page: '''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conse...
2007-11-15T03:00:46Z
<p>New page: '''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conse...</p>
<p><b>New page</b></p><div>'''Momentum is always conserved.''' The momenta of individual objects in a system may vary, but the vector sum of all the momenta will not change. Therefore, momentum is said to be conserved.<br />
<br />
The conservation of momentum in a glancing collision between two objects is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1}V_\mathrm{1f}\right) + \left(M_\mathrm{2}V_\mathrm{2f}\right)</math><br />
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The conservation of momentum in a collision between two objects where the two objects become one is expressed as <math> \left(M_\mathrm{1}V_\mathrm{1i}\right) + \left(M_\mathrm{2}V_\mathrm{2i}\right) = \left(M_\mathrm{1} + M_\mathrm{2}\right)V_\mathrm{f}</math></div>
imported>Jake Gaylor