# How does a lubricant affect the efficiency and the frictional forces of a machine?

## How does a lubricant affect the efficiency and the frictional forces of a machine?

Lubrication reduces the heat generated when two surfaces are in motion. It smoothes the process by forming a film between two surfaces that reduces friction and thus improves performance and efficiency.

## How does lubrication of moving parts increase efficiency of a machine?

Lubrication reduces friction and allows moving machine parts to slide smoothly past each other. Selecting the appropriate lubrication solution can help reduce premature bearing failures and increase machine uptime, productivity and energy efficiency.

How Can machines be useful if the output work is less than the input work?

In fact, the work output of a machine is always less than the work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work.

### Why do we use machines if the output work is always less than the input work?

Machine Efficiency The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent. The closer to 100 percent a machine’s efficiency is, the better it is at reducing friction.

### Why is it important to use lubricant?

Lube reduces friction, so lessens your risk of injury during sex. And if you’re using condoms, lube also makes it less likely that it’ll break or fall off, therefore increasing your protection against STIs including HIV.

How can you increase a machine’s work output?

The only way to increase the work output is to increase the work input. You can’t get more work out of a machine than you put into it. The moving parts of a machine must use some of the work input to overcome friction. Because of friction, the work output of a machine is always less than the work input.

## What are 2 ways to reduce friction?

Methods for decreasing friction:

• Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.
• Lubrication is another way to make a surface smoother.
• Make the object more streamlined.
• Reduce the forces acting on the surfaces.
• Reduce the contact between the surfaces.

## Which is the mechanical advantage of a machine?

The mechanical advantage of a machine is less than one. Compare the distances over which the input and output forces are applied. The distance over which the output force is applied is greater than the distance that the input force is applied.

Why is the output work always less than the input work?

Explain why in a real machine the output work is always less than the input work. In a real machine, some of the input work is converted into thermal energy by friction.

### How to calculate the efficiency of a machine?

Find the efficiency of a machine that does 800 J of work if the input work is 2,400 J. eff= W (out)/W (in) x 100% 33% Find the force needed to lift a 2,000 N weight using a machine with a mechanical advantage of 15. F(in) = F (out)/MA

### How to calculate the mechanical advantage of a hammer?

The distance over which the output force is applied is greater than the distance that the input force is applied. Calculate the mechanical advantage of a hammer if the input force is 125 N and the output force is 2,000 N. MA=F (out)/F (in)