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Transcript

Graph

Background Research

There are two types of friction, static friction and kinetic friction.Even the smoothest floors have friction but very little.If a floor had no friction then you could throw a marble and it could keep on going on and on until it crashed with another object. In Static friction you check how much force it takes to move the object.In Kinetic friction,you find the amount of friction while it is moving.If you were in a car and you were constantly accelerating,(remember,acceleration=new velocity -initial velocity time taken ) you would not have to worry about friction slowing you down. Have you ever had a floor burn. What is happening is really that the frictional force of the surface you are sliding against is reacting with your skin.

Procedure

1.Find the weight of a certain weighing cube.

2.Put the cube on a wooden rectangle with the metal surface.

3.Hook the Newton scale up with the rectangle.

4.Check how much friction it takes to pull the rectangle.

5.Then check how much force it takes while it is moving.

6.Repeat steps 1-6 with the rest of the variables.

7.Add the lubricant(Oil) and see how much the required force reduces.

8.Record results in Data section.

Data continued

How to Reduce Friction

Kinetic friction for Lead-8.0N sandpaper surface

Static friction for Lead-6.0N sandpaper surface

Kinetic friction for Iron-5.5N sandpaper surface

Static friction for Iron-5.0N sandpaper surface

Kinetic friction for Brass-6.0N sandpaper surface

Static friction for Brass-5.5N sandpaper surface

Kinetic friction for Aluminum-2.1N sandpaper surface

Static friction for Aluminum-1.9N sandpaper surface(sandpaper against cork)

Kinetic friction for Lead-5.0N wood surface

Static friction for Lead-4.8 wood surface

Kinetic friction for Iron-3 wood surface

Static friction for Iron-2.9 wood surface

Kinetic friction for Bass-3.1 wood surface

Static friction for Bass-3 wood surface

Kinetic friction for Aluminum-1.2

static friction for Aluminum- 0.9

(wood against cork)

With lubricant

Lead -2N

Brass -1.5N

Iron -4N

Aluminum -0.6N

Data

The weight for the cubes are

Aluminum Silver-87.43g

Brass Yellow-271.09g

Lead Grey-352.25g

Iron Brown-249.85g

Kinetic friction for Lead -1 N wood surface

Static Friction for Lead - 0. 9N wood surface

Kinetic Friction for Brass -1.1 N wood surface\

Static Friction for Brass - 1 N wood surface

Kinetic Friction for Iron -0.9 N wood surface

Static Friction for Iron -0.5 N wood surface

Kinetic Friction for Aluminum-0.05 wood surface

Static Friction for Aluminum-0.01 N (wood against wood)

Kinetic Friction for Lead 3.5 N sandpaper surface

Static Friction for Lead-2 N sandpaper surface

Kinetic Friction for Brass-2.1 N sandpaper surface

Static Friction for Brass- 1.9 N sandpaper surface

Kinetic Friction for Iron-1.8N sandpaper surface

Static Friction for Iron-0.9N sandpaper surface

Kinetic Friction for Aluminum-0.5N sandpaper surface

Static Friction for Aluminum-0.5N sandpaper surface(sandpaper against wood)

By: Mekhi and Vikram

Materials

35.6cm wooden plank,Wooden rectangles with different surfaces. Olive Oil(Lubricant) and 4 different weighing cubes (Brass yellow,Aluminum white,Iron brown and Lead grey).

Variables

The Manipulated variable is the kind of metal cubes. The dependent variable is the lubricant.

Data Continued

Data continued

Kinetic friction for Lead-8.0N sandpaper surface

Static friction for Lead-6.0N sandpaper surface

Kinetic friction for Iron-5.5N sandpaper surface

Static friction for Iron-5.0N sandpaper surface

Kinetic friction for Brass-6.0N sandpaper surface

Static friction for Brass-5.5N sandpaper surface

Kinetic friction for Aluminum-2.1N sandpaper surface

Static friction for Aluminum-1.9N sandpaper surface(sandpaper against cork)

Kinetic friction for Lead-5.0N wood surface

Static friction for Lead-4.8 wood surface

Kinetic friction for Iron-3 wood surface

Static friction for Iron-2.9 wood surface

Kinetic friction for Bass-3.1 wood surface

Static friction for Bass-3 wood surface

Kinetic friction for Aluminum-1.2

static friction for Aluminum- 0.9

(wood against cork)

With lubricant

Lead -2N

Brass -1.5N

Iron -4N

Aluminum -0.6N

Kinetic friction for Lead-2.7 N metal surface

Static friction for Lead-2.1 N metal surface

Kinetic friction for Iron-1.9 N metal surface

Static friction for Iron-1.8 N metal surface

Kinetic friction for Brass-1.9N metal surface

Static friction for Brass-1.5N metal surface

Kinetic friction for Aluminum-0.5N metal surface

Static friction for Aluminum-0.3N metal surface(metal against wood)

Kinetic friction for Lead-6.0N metal surface

Static friction for Lead-3.0N metal surface

Kinetic friction for Iron-4.0N metal surface

Static friction for Iron-3.9N metal surface

Kinetic friction for Brass-4.5N metal surface

Static friction for Brass-3.9N metal surface

Kinetic friction for Aluminum-1.4N metal surface

Static friction for Aluminum-1.3N metal surface(metal against cork)

Conclusion

In summary,we conclude that there are two main ways to reducing friction.1.)Using a smoother surface against itself,2.)Adding a lubricant, almond oil. According to all of our data it depends on the weight of the manipulated variable on how much friction it causes against the independent variable.

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