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

Physics ball bearing investiagtion

Extracts from this document...

Introduction

DATA ANAYLIS – BALL BEARING

By Jessica Tilbrook

Physics coursework – data analysis: ball bearing

Aim: -

To establish the relationship between the heights from which the ball bearing was dropped and the depth of the crater created in the sand.

Apparatus: -

  • 1 x clamp (stand)                        - Somewhere to record your results.
  • 1 x ball bearing (0.0165kg)                - 1 x Boss head
  • 1 x tray full of sand                        - 1 x Magnet
  • 5 – 10 candles                                - 1 x Nail
  • Matches
  • Gogglesimage24.png
  • Newspaper
  • 1 x 1 metre rulerimage00.pngimage01.png

How your apparatus should be set up image12.png

image17.png

Method: -

  1. Get all the Apparatus out, and set it up like it is shown above.
  2. Place the clamp with the boss head outside of the sand tray. Then put the 1 metre ruler into the boss head, so the ruler goes straight down to the bottom of the sand tray. Make sure the ruler is straight (at a 90 ̊ angle)image25.png
  3. This is how the experiment should take place, by holding the magnet at the height you wish to drop it, and they holding the nail in front of the magnet, so then the magnet and the nail attach,
  4. Then hold the ball bearing roughly 1cm away from the nail
  5. Drop the ball bearing 3 times for each height. Making sure you apply no pressure when dropping the ball bearing, to make it as fair as possible. Repeat this 3 times for 10
...read more.

Middle

0.0495

2.4

0.040

0.066

0.066

2.82

0.050

0.0825

0.0825

3.16

0.060

0.099

0.099

3.46

0.070

0.1155

0.1155

3.74

0.080

0.132

0.132

4

0.090

0.1485

0.1485

4.24

0.100

0.165

0.165

4.41

DATA ANAYLIS graphs. *

The first graph I did was on my first set of results, which I test each height 3 times, the graph showed the relationship between the depth of crater to the height it was dropped.

  • On my results table (depth of crater, height dropped from) which is on the back of the first graph, I circled two of my results which I feel are outliers, as they were way out of the other results that I had recorded.
  • I think the outliers were caused by either the person dropping the ball bearing applied some pressure, or it wasn’t dropped at the exact height, or the sand was unlevel. We didn’t include most of the outliers which I thought were extravagantly different to my other results, so it wouldn’t affect my overall results that much. I also didn’t include the extravagant outliers on my averages; otherwise i would get an invalided set of data.  
  • I think most my results on my first experiment were reliable, but to make it fairer dropping the ball at more than 3 times, it would have made it even more reliable, than it already was.

Graph #2 –

My second graph showed the same as the first (showed the relationship between the height of depth of crater to the height it was dropped) but with an improved method.

  • My second sets of results, in my opinion were a lot more reliable, as I tested it 5 times for each height, instead of 3 like the last time.
  • Therefore I didn’t find any outlier, meaning my results were very reliable, because we made sure we did the second set of results more accurately and took more time. Meaning reliable results.

Graph #3 –

This graph show the relationship between the crater depths and velocity,

  • I used the averages from my second sets of results as they were more accurate, meaning this graph would be more accurate.

Graph #4 -

This graph showed the relationship between the velocity and the height the ball bearing was dropped at.

  • This graph is very accurate, it goes up at a steady pace, and the distances between each reading are very similar.

Improvements to the method –

I think my method was very good, but we didn’t do a few things that we probably should of, like:

  • Every time you took the wax out of the crater, you should smooth down the sand, so lumps and bumps are at a minimum, making your results a lot more reliable.image22.pngimage28.png
  • Made sure the magnet that was attached to the nail which held the ball bearing was exactly at the right height. image23.pngimage02.png
...read more.

Conclusion

Conclusion;

  • I think my results are quiet accurate, although I don’t think they are 100%, as a number of things could have happened, like what I mentioned above.
  • On my first set of results, I found two outliers, i thought they were both outliers because they were 0.4 below the lowest of the other results, this is probably because when it was dropped it was dropped slightly lower than they should have.

Most of my results don’t have a large range making them more accurate the biggest range I have is (without outliers) 0.3cm so a close range.

Height (m)

Crater depth (cm)

0.010

1.1

0.020

1.2

0.030

1.5

0.040

1.3

0.050

1.4

0.060

1.8

0.070

2.2

0.080

2.2

0.090

2.3

0.100

2.6

I think reasons why they could have been inaccurate, are that the heights which they were dropped were not precise enough, and people many putting a little pressure on the ball bearing causing inaccurate results.

  • If I had more time I would have made sure everything was done very carefully and accurately, and there are a couple of outliers which if i had time would have tested them again.
  • I am fairly confident with my results, but like I have said I would have like to re-do some of the outliers I found.

I think my experiment was quiet successful, apart from the few outliers, which was probably due to pressure of dropping the ball bearings or it was not dropped at the correct height.

image16.pngimage15.png

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism 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

See related essaysSee related essays

Related GCSE Electricity and Magnetism essays

  1. Investigating the relationship between drop height and bounce height when a ball is dropped.

    One thing I would definitely change is the amount of experiments made for the experiment. After I have done my first three experiments I then was told that they are for the preliminary work and therefore couldn't use them in my official experiment and report.

  2. The Bouncing Ball Experiment

    proportional to the amount of gravitational potential energy stored in the ball I am going to make some calculations using the formula for GPE. The GPE formula is: GPE = Height x mass x Gravitational Field Strength. Using this formula, I can work out how much GPE the ball had

  1. Investigate how mass affects the diameter of an impact crater.

    The graph shows that the crater size (y) increases by a significant amount for each of the increasing masses (x) used. Also as can be seen, a curve is formed which argues my prediction is incorrect. Nevertheless it is far too early to validate this since there is insufficient evidence.

  2. Does the height a ball is dropped from affect its efficiency?

    will bounce higher because there will be a greater amount of Gravitational potential energy for it to transfer into to kinetic energy. Also the velocity of the ball will increase as the height the ball is dropped from increases. In my pre-test I gained a lot of anomalous results, and

  1. physics of the bouncing ball

    8.6 9.2 8 7.6 9.2 6.2 6.2 I have carried out a scientific investigation that is designed to prove whether or not the bounce height of a ball is affected by the drop height or the material from which the ball is made.

  2. See how changing the height that a ball is dropped affects: the height to ...

    for a fair test 1. Set up equipment as shown in the diagram. 2. Drop ball from 0.25 metres. 3. Repeat step 2 for 0.5, 0.75, 1, 1.25, 1.5, 1.75 and 2 metres. This is a large number and range readings so results should be accurate and reliable.

  1. Investigate how the height a ball is dropped from affects the re-bounce of it.

    Also, I will not vary the angle of the bench or the angle I drop the ball from. The bench will remain horizontal, and I will drop the ball perpendicular to the bench. My independent variable will be the various heights I drop my ball from, causing my dependant variable to be the height it bounces back.

  2. Does the height of a crater affect the diameter of the crater produced?

    The required heights are going to be 10, 20, 30, 40, 50, and 60 cm. * For each height measure the diameter of the crater that is formed. * After doing this, repeat the experiment twice again to make sure the results are around the same so I can check if the results are right.

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