• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# Friction and its issues.

Extracts from this document...

Introduction

Eni Ballauri

9A

March 2nd, 2007

Physics

Friction

‘Friction is the force that resists the motion of one surface relative to another with which it is in contact.’[1] Friction has three main kinds. Firstly, the sliding or kinetic friction, which is produced by sliding two surfaces across each other [2]. A good example is when we walk. Secondly, the rolling friction, which is resistance produced when a rolling body moves over a surface [2]. For instance, a bicycle moving in the street. Thirdly, the fluid friction or viscosity is the friction between fluids or a fluid and a solid. [2] An example for fluid friction is the boat moving in the water.

Without friction our life would definitely change. For instance, if there was not any friction between the lead of the pencil and the paper, we would not be able to write.

Middle

[3] Friction is a force, and without friction we would stay still, or we would move in a straight line with the same velocity without ever stopping.

On the other hand, friction may also be a nuisance and many times is needed to be reduced. For example, while ice scatting or skiing, friction is a nuisance. Even though there is a sliding motion, there is still some friction between the shoes and the ice. In this case the friction is a nuisance. Also friction occurs when a door, which touches the ground, has to be opened. This requires a big force. Another example of friction is between the bicycle chain and the wheels. In that case friction is required, but it can also be reduced with oil or grease.

Conclusion

n in contact with the car, may damage it by oxidising parts of the car. There are also some special chains for the tyres of cars, which provide friction. So in an ethical consideration, friction is balanced between nuisance and usefulness.

All in all, science has helped us a lot by discovering everything we know for friction. Science has helped up provide friction when is needed, and reduce it as well, even though not totally. Despite this fact, science has also limitations concerning friction issues. Science has not managed to totally reduce friction. We will never be able to know everything about friction and its issues.

(670 words)

Bibliography:

1. Oxford reference “ A Concise Dictionary of Physics” page 104

Oxford New York – Oxford University Press, 1992

1. F  “The World Book Encyclopaedia” page 459

USA – 1992

1. Stephen Pople “Co-ordinated Science Physics”

Oxford University Press Singapore - 1992

This student written piece of work is one of many that can be found in our GCSE Forces and Motion section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Forces and Motion essays

3 star(s)

them so that, for example, nails don't damage it and lead to a crash. 2.2 Roads Roads are also getting better. They are getting safer with less tight angle curves. They have berms which warn you with a sound, when people change track, which may awake a tired driver.

2. ## Investigation into Viscosity in liquids(Stokes Law).

All five ball bearings seemed to reach their terminal velocity at the same timed interval. Viscosity of liquid The second set of experiments was to show the affects of a more viscous liquid (engine oil) on the decent of a ball bearing.

1. ## Measuring the Viscosity of Honey

r = d/2 ?s = m/V ?s = m/[(4/3)r3 ?] ?s = 3m/4r3? The ball bearing should then be held at the surface of the honey and released. The time taken for the ball bearing to travel the first 5cm below the surface would not be measured, I will start

2. ## Investigation into Friction.

In this experiment, the surfaces will not be sliding over one another and so the coefficient that will be used will be the coefficient of static friction. The symbol used to denote the coefficient of friction is mu (?). The formula that gives the coefficient of friction is: � =

1. ## Investigating the viscosity of liquids.

is the density of water, ?steel is the density of steel, and v is the terminal velocity at which the sphere travels at. We could now rearrange the formula to find the viscosity, �: F = W - U 6?r?v = 4?r3?fluidg / 3 - 4?r3?steel g / 3 (Cancel out ?

2. ## Viscosity of Fluids

Gravity: Although gravity on Earth is 9.8ms-2 if the experiment were to be carried out else where i.e. on the moon, the same viscosity would not be calculated. Investigation I am going to investigate the effect of temperature on the viscosity of honey.

1. ## Liquid Friction.

Method Notes Where as the method previously described was completely descriptive of what happened. I am going to look into it with slightly more detail. The tweezers were used to ensure that no finger grease got onto each ball, this is to create a fair test situation where each ball is treated in the same way.