• 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
4. 4
4
5. 5
5
6. 6
6

# Perform an experiment on friction and the variables of friction using a wooden block, a piece of string and a Newton meter.

Extracts from this document...

Introduction

GCSE Physics Coursework

I am going to perform an experiment on friction and the variables of friction using a wooden block, a piece of string and a Newton meter. I will test 3 variables: weight, surface area and surface texture. Each test will be repeated 5 times to get a fair range of results.

Friction is the force of two objects rubbing together and slowing and/or stopping each other. The amount of friction produced depends on the appearance of its surface for example:

The surface of the sandpaper has deep slopes and the surface of the paper has to move up and down those slopes to proceed, causing friction.

My first test will be done to measure the affect of weight on the amount of friction between the block and the table top.

The block ill be placed on the table and the Newton meter tied to it. Then the Newton meter will be pulled until the block starts to move and as soon as it does the amount of Newton’s required to cause that movement will be recorded.

Middle

Block + 5N

2.8

3.5

4

3.5

3.6

3.5

In the first experiment weight was tested and a set of results produced. In this second experiment the surface area in contact with the desk will be tested.

To obtain my results I will use the following method, the block will be placed on two sheets of paper a measured distance apart with a Newton meter tied to it. The block will then be pulled and as it begins to move the amount of Newton’s required to cause this will be recorded. Each test will be done 5 times then averaged.

To make sure it is a fair test I will; as the same Newton meter ensuring non-introduction of new variables, use the same side of the block, use the same two pieces of paper and make sure the blocks movement is parallel to the supporting surface.

I predict that as the surface area of the block exposed to the desk increases so will the amount of Newton’s required to move it because there will be more sharper ridges to pass over therefore requiring more Newton’s. My results were as follows:

 Exp mm2 T(n) T2(n) T3(n) T4(n) T5(n) Avg(N) 11.3 0.5 0.9 1.1 1.2 0.7 0.88 22.6 0.6 0.6 1.1 0.7 0.6 0.92.72 33.9 1.2 1.1 1.1 1.1 0.9 1.08 45.2 1.1 1.1 1.1 0.9 1.1 1.06 56.5 1.1 1 0.9 0.7 0.6 0.86 68.1 1.1 1.1 0.9 1.1 0.6 0.96

Conclusion

I feel the experiment was performed rather  well but there is room for improvement, to have maybe got fairer more accurate results I could have maybe repeated the experiment once or twice on all of them, then I would have more data to analyse giving me a better chance at accuracy. In all the three experiments instead of using the human hand to pull the Newton meter use a machine which would be less prone to inconsistency and use a table top free of blemishes. In the second experiment the block could have been placed on previously constructed platforms each measured to have 4 sides the same and those sides to be the measurements used meaning the non need of paper and a lot more accurate readings.

This student written piece of work is one of many that can be found in our AS and A Level Mechanics & Radioactivity 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 AS and A Level Mechanics & Radioactivity essays

1. ## Sir Isaac Newton.

3 star(s)

According to de Moivre Newton's interest in mathematics began in the autumn of 1663 when he bought an astrology book at a fair in Cambridge and found that he could not understand the mathematics in it. Attempting to read a trigonometry book, he found that he lacked knowledge of geometry and so decided to read Barrow's edition of Euclid's Elements.

2. ## Force of Friction experiment

The set up is connected as shown below. 2. Slowly push the wooden plank (together with the trolley underneath) away from the spring balance. Note the increase in the spring balance's reading which indicates the static friction . When the block starts to slide, quickly read the spring balance.

1. ## The physics involved with a rollercoaster.

When the marble slows down and speeds up on the hills it is visually obvious. What is not so visually obvious is what happens along the horizontal section of the track. The ball's constant velocity can be shown mathematically. Divide the horizontal section of the track into 2 sections.

2. ## Investigating the factors affecting tensile strength of human hair.

This could have increased or decreased the bond attractions in the hair to cause the hair to have a high or low tensile stress. This would make my results unreliable. The hairs showing higher tensile stress may just be showing how sticky the selotape is and how strongly it is holding the hair structure together.

1. ## Multi-bladed Pumps. Does the number of propellor blades affect the efficiency of a ...

It will not matter that the speed of rotation varies depending on how much the water resists the motion of the propeller. The only data that are needed to calculate the efficiency of the system are power input and useful power output.

2. ## Is Helmut Newton's photography artistic or pornographic?

However, he was fired two weeks later due to incompetence.1 After spending a couple of years in Singapore without work, trying to "sleep himself" through life, he lost any professional ambition. He had indifferent opinions about photography. In 1940, being only 20 years old, he got carried off to an Australian internment camp.

1. ## This experiment is designed to approximate &amp;amp;igrave;, the coefficient of friction, for two surfaces. ...

Coulomb's law is correct This will make a big difference to our results. By assuming that , our calculations are fairly simple. However, this linear model is incorrect. This will affect our results considerably, and may results in a curve being plotted from our results instead of a straight line.

2. ## Find out what happens to the distance travelled by two standard tubes of different ...

Gently let go of the tubing, but make sure you don't push it, if you do it will gain more energy and make it an unfair test. Wait and see where it stops. Measure to this point from the line of release you have drawn with the metre ruler and record.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to