Simple machine - Revision history

Jmdonev: 1 revision imported

2021-09-27T00:03:10Z

1 revision imported

← Older revision	Revision as of 00:03, 27 September 2021
(No difference)

energy>Ethan.boechler at 20:21, 10 September 2021

2021-09-10T20:21:45Z

← Older revision		Revision as of 20:21, 10 September 2021
Line 2:		Line 2:
	[[Category:3A_Energy_A_closer_look]]		[[Category:3A_Energy_A_closer_look]]
	[[Category:371_topics]]		[[Category:371_topics]]
			[[Category:Translated to French]]
			[[fr:Machine simple]]
	[[File:Crane Pulley.jpg\|250px\|thumb\|right\|Figure 1: Example of a simple machine, the pulley, in practical use.<ref>Wikimedia Commons [Online], Available: http://commons.wikimedia.org/wiki/File:Crane_Pulley.jpg</ref>]]		[[File:Crane Pulley.jpg\|250px\|thumb\|right\|Figure 1: Example of a simple machine, the pulley, in practical use.<ref>Wikimedia Commons [Online], Available: http://commons.wikimedia.org/wiki/File:Crane_Pulley.jpg</ref>]]
	<onlyinclude>A '''simple machine''' is a physical device that changes the magnitude or direction of a [[force]]. It should be noted that these machines do nothing to change the amount of [[energy]] used, just how hard it is to use that energy.</onlyinclude>		<onlyinclude>A '''simple machine''' is a physical device that changes the magnitude or direction of a [[force]]. It should be noted that these machines do nothing to change the amount of [[energy]] used, just how hard it is to use that energy.</onlyinclude>

Jmdonev: 1 revision imported

2017-08-29T01:47:22Z

1 revision imported

← Older revision	Revision as of 01:47, 29 August 2017
(No difference)

Jmdonev at 22:16, 16 August 2017

2017-08-16T22:16:54Z

← Older revision		Revision as of 22:16, 16 August 2017
Line 1:		Line 1:
	[[Category:Done ~~2015~~-06-01]]		[[Category:Done 2017-07-01]]
	[[Category:3A_Energy_A_closer_look]]		[[Category:3A_Energy_A_closer_look]]
	[[Category:371_topics]]		[[Category:371_topics]]
Line 7:		Line 7:
	Machines in general are thought of as making human's lives easier, and simple machines are the foundation of any device of this nature. Such machines were defined in Renaissance days, and include [[lever]]s, [[pulley]]s, [[inclined plane]]s, wedges, the [[wheel and axle]], [[gear]]s and screws.<ref>Machine Information Systems, ''Simple machines'' [Online], Available: http://www.machine-information-systems.com/Simple_Machines.html</ref>		Machines in general are thought of as making human's lives easier, and simple machines are the foundation of any device of this nature. Such machines were defined in Renaissance days, and include [[lever]]s, [[pulley]]s, [[inclined plane]]s, wedges, the [[wheel and axle]], [[gear]]s and screws.<ref>Machine Information Systems, ''Simple machines'' [Online], Available: http://www.machine-information-systems.com/Simple_Machines.html</ref>

	The underlying principle of a simple machine is the [[mechanical advantage]] that it provides. Mechanical advantage is the ratio of the output force of the machine to the force that was applied to it. This means that the applied force can be small, while the output force to an object can be much larger than it! This is limited by the [[conservation of energy]] however, <m>F_id_i=F_od_o</m>, so although the output force can be large, the distance it travels must be smaller in direct proportion. The (ideal) mechanical advantage is the ratio of applied force to the output force:<ref>James Brennan, ''Simple Machines'' [Online], Available: http://jamesbrennan.org/physics/notes/Force/simple_machines.htm</ref>		The underlying principle of a simple machine is the [[mechanical advantage]] that it provides. Mechanical advantage is the ratio of the output force of the machine to the force that was applied to it. This means that the applied force can be small, while the output force to an object can be much larger than it! This is limited by the [[conservation of energy]] however, <math>F_i \times d_i=F_o \times d_o</math>, so although the output force can be large, the distance it travels must be smaller in direct proportion. The (ideal) mechanical advantage is the ratio of applied force to the output force:<ref>James Brennan, ''Simple Machines'' [Online], Available: http://jamesbrennan.org/physics/notes/Force/simple_machines.htm</ref>

	Ideal mechanical advantage = <m>\frac{F_o}{F_i}=\frac{d_i}{d_o}</m>		Ideal mechanical advantage = <math>\frac{F_o}{F_i}=\frac{d_i}{d_o}</math>

	where		where
	* <m>F_i</m> is the input force,		* <math>F_i</math> is the input force,
	* <m>F_o</m> is the output force,		* <math>F_o</math> is the output force,
	* <m>d_i</m> is the distance the input force was applied for, and		* <math>d_i</math> is the distance the input force was applied for, and
	* <m>d_o</m> is the distance traveled by the object.		* <math>d_o</math> is the distance traveled by the object.

	This equation for mechanical advantage is given by rearranging the conservation of energy equation from above. The equation above is also for an ideal system (with no [[non-conservative force]]s acting on it), while realistically there will be some losses of energy.		This equation for mechanical advantage is given by rearranging the conservation of energy equation from above. The equation above is also for an ideal system (with no [[non-conservative force]]s acting on it), while realistically there will be some losses of energy.

J.williams: 1 revision imported

2015-08-26T21:31:39Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
(No difference)

J.williams at 16:59, 12 August 2015

2015-08-12T16:59:01Z

New page

[[Category:Done 2015-06-01]]
[[Category:3A_Energy_A_closer_look]]
[[Category:371_topics]]
[[File:Crane Pulley.jpg|250px|thumb|right|Figure 1: Example of a simple machine, the pulley, in practical use.<ref>Wikimedia Commons [Online], Available: http://commons.wikimedia.org/wiki/File:Crane_Pulley.jpg</ref>]]
<onlyinclude>A '''simple machine''' is a physical device that changes the magnitude or direction of a [[force]]. It should be noted that these machines do nothing to change the amount of [[energy]] used, just how hard it is to use that energy.</onlyinclude>

Machines in general are thought of as making human's lives easier, and simple machines are the foundation of any device of this nature. Such machines were defined in Renaissance days, and include [[lever]]s, [[pulley]]s, [[inclined plane]]s, wedges, the [[wheel and axle]], [[gear]]s and screws.<ref>Machine Information Systems, ''Simple machines'' [Online], Available: http://www.machine-information-systems.com/Simple_Machines.html</ref>

The underlying principle of a simple machine is the [[mechanical advantage]] that it provides. Mechanical advantage is the ratio of the output force of the machine to the force that was applied to it. This means that the applied force can be small, while the output force to an object can be much larger than it! This is limited by the [[conservation of energy]] however, <m>F_i*d_i=F_o*d_o</m>, so although the output force can be large, the distance it travels must be smaller in direct proportion. The (ideal) mechanical advantage is the ratio of applied force to the output force:<ref>James Brennan, ''Simple Machines'' [Online], Available: http://jamesbrennan.org/physics/notes/Force/simple_machines.htm</ref>

Ideal mechanical advantage = <m>\frac{F_o}{F_i}=\frac{d_i}{d_o}</m>

where
* <m>F_i</m> is the input force,
* <m>F_o</m> is the output force,
* <m>d_i</m> is the distance the input force was applied for, and
* <m>d_o</m> is the distance traveled by the object.

This equation for mechanical advantage is given by rearranging the conservation of energy equation from above. The equation above is also for an ideal system (with no [[non-conservative force]]s acting on it), while realistically there will be some losses of energy.

Say for example, the mechanical advantage is equal to 2. This means that the object experienced '''twice''' the force that was applied, but the distance it traveled is '''half''' of what was applied to the system. Despite the advantage of not having to push as hard the [[work]] done stays the same (since work is force times distance and the amount that the force goes down is the same amount that the distance goes up). Even [[engine]]s and work animals (like oxen, elephants or horses) still benefit from the mechanical advantages of simple machines.

==References==
{{reflist}}
[[Category:Uploaded]]