DEFINITION: friction is the force that opposes the motion of an object.
HOW IT AFFECTS EFFICIENCY: Friction affects efficiency because the force of friction transfers the work energy (the work put into doing the task) into heat energy, therefore requiring more input work than output work. Requiring more input work than output work would make the calculation have a bigger numerator than denominator therefore making the final answer less than 100%.
HOW TO IMPROVE EFFICIENCY/REDUCE FRICTION: To improve efficiency of any machine you can add oil or something greasy to the parts that touch each other so that when the surfaces touch they will run faster and smoother, therefore creating less friction and putting the input work to use. Another way to improve efficiency is to flatten and straiten any jagged of rough surfaces so that the friction is reduced and the input work is used for complete the job.
Here are links to my other pages
~Home Page~ Work Input-Work Output~ Calculating ~ Practice-Quiz~ Practice-Quiz Answer~ Bibliography~
In an ideal world the mechanical efficiency of a machine would be 100%, But it cannot because friction takes the work energy and turns it into heat energy instead.
Here is a website that has all the information on friction you need.......
http://www.physics4kids.com/files/motion_friction.html
DEFINITION: friction is the force that opposes the motion of an object.
HOW IT AFFECTS EFFICIENCY: Friction affects efficiency because the force of friction transfers the work energy (the work put into doing the task) into heat energy, therefore requiring more input work than output work. Requiring more input work than output work would make the calculation have a bigger numerator than denominator therefore making the final answer less than 100%.
HOW TO IMPROVE EFFICIENCY/REDUCE FRICTION: To improve efficiency of any machine you can add oil or something greasy to the parts that touch each other so that when the surfaces touch they will run faster and smoother, therefore creating less friction and putting the input work to use. Another way to improve efficiency is to flatten and straiten any jagged of rough surfaces so that the friction is reduced and the input work is used for complete the job.
Another website on friction.....
http://hyperphysics.phy-astr.gsu.edu/hbase/frict.html
Here is a eureka video on friction. (Skip to 3:25)
http://www.schooltube.com/video/e8419c70e9bdf67d3d85/