To increase the mechanical efficiency of a machine you need to reduce the amount of friction. Friction is the result of services rubbing together, therefore in this case it would be two parts of the machine rubbing against each other. To reduce the amount of friction in a machine there are a few things you can do. But first we must answer the question, why do we need to reduce the amount of friction? The reason for this is because when parts of a machine rub against each other the parts tend to stick together which slows down the machine and heats up the parts, this is friction. Therefore as a result of this the energy that was used to drive the machine is diverted from its purpose, making the machine less efficient.
To reduce the amount of friction (increasing the mechanical efficiency) you can apply lubricants (e.g oil, grease) to the parts that are rubbing together on the machine. This will insure that the parts that come into contact can slide past one another more easily. This way the parts of the machine will not stick together and heat up as much, resulting in a more efficient machine. An example of where this would work would be a box that you are pushing up a ramp. When you push the box up the ramp the bottom of it rubs against the top of the ramp, the surfaces rub against each other which creates friction. To reduce the friction you would apply lubricants to the two parts that are rubbing against each other, this would make it easier for the surfaces to slide past each other, making your job easier.
Another way to reduce the amount of friction on a machine like an inclined plane is to add wheels to the object that you are pulling up the ramp. This reduces the amount of friction (which increases the mechanical efficiency) because the wheels are not touching as much of the surface of the ramp as the object would be if there were not wheels on it.
First of all, here is a quick video of reducing friction!!
Reducing Friction
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To increase the mechanical efficiency of a machine you need to reduce the amount of friction. Friction is the result of services rubbing together, therefore in this case it would be two parts of the machine rubbing against each other. To reduce the amount of friction in a machine there are a few things you can do. But first we must answer the question, why do we need to reduce the amount of friction? The reason for this is because when parts of a machine rub against each other the parts tend to stick together which slows down the machine and heats up the parts, this is friction. Therefore as a result of this the energy that was used to drive the machine is diverted from its purpose, making the machine less efficient.
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To reduce the amount of friction (increasing the mechanical efficiency) you can apply lubricants (e.g oil, grease) to the parts that are rubbing together on the machine. This will insure that the parts that come into contact can slide past one another more easily. This way the parts of the machine will not stick together and heat up as much, resulting in a more efficient machine. An example of where this would work would be a box that you are pushing up a ramp. When you push the box up the ramp the bottom of it rubs against the top of the ramp, the surfaces rub against each other which creates friction. To reduce the friction you would apply lubricants to the two parts that are rubbing against each other, this would make it easier for the surfaces to slide past each other, making your job easier.
Another way to reduce the amount of friction on a machine like an inclined plane is to add wheels to the object that you are pulling up the ramp. This reduces the amount of friction (which increases the mechanical efficiency) because the wheels are not touching as much of the surface of the ramp as the object would be if there were not wheels on it.