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Q: How is friction and mechanical efficiency related?
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If there was no friction what would that do to mechanical advantage and how would it affect efficiency?

Without friction, some forms of mechanical advantage do not function. In most cases for a mechanical apparatus, a reduction in friction is usually accompanied by an increase in efficiency.


What role does friction have in reducing mechanical efficiency?

Friction is the reason that you can never have a 100% efficient machine. It is the reason that most machine have horrible efficiency.


The efficiency of the wedge is low because of?

friction or The mechanical advantage is greater for thinner wedges. However, the efficiency is low because of the large amount of friction.


What efficiency is assumed when calculating the ideal mechanical advantage?

The assumed efficiency is 100% without any friction


What role does friction have in mechanical efficiency?

Nothing is 100% efficient because friction acts opposite on everything.


What can be done to increase the efficiency of the machine?

Mechanical Efficiency is the ratio of Actual mechanical advantage to ideal mechanical advantage.Efficiency will be maximum when Actual mechanical advantage equals that of ideal.But practically not possible.Actual mechanical advantage will be less due to friction,heat,deflection etc.avoiding these loses will increase the machine efficiency.


What would happen to a pulley system if the load were increased?

Ideal mechanical advantage is the mechanical advantage when there is no friction. It is the mechanical advantage when the efficiency of the pullefy system is 100%. It is a constant for that system of pulleys. Therfore it is not affected by increasing or decreasing the load. But actual mechanical advantage will be less than this ideal mechanical advantage due to friction. In other words the efficiency will be less than 100 %. If the efficiency is 80%, it implies 20% is wasted due to friction while lifting a load. If we increase the load the friction also increases and hence the efficiency will decrease with the load.


What examples describes mechanical efficiency?

greasing a surface helps reduce friction


Friction is not related to the efficiency of a machine true?

false


Levers have a greater mechanical efficiency that other simple machines because?

They have to overcome less friction


Why do levers have a greater mechanical efficiency than simple machines?

The transmission lever is very simple and there is no friction.


Why a normal machine could not have the mechanical efficiency of 100?

Because there is always going to be friction, the efficiency of any machine will always be less then 100 percent.