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

Science Course Work : Free Fall

Extracts from this document...

Introduction

Science Course Work : Free Fall Planning I am going to investigate the effects of changing the spinners speed on the drag. There are several variables that I could investigate to see their effects on the spinners drag. 1. Shape- I could alter the shape of the spinner 2. Size- I could investigate the effects on drag with different sizes of blade 3. Speed- I could change the weight to increase or decrease the speed. Shape- if I changed the shape of the spinner the air resistance would change. For a ball of paper to accelerate at the same speed as a smaller spinner would require more force (gravity) and hence would need more weight to fall at the same speed. This is because more air is having to be displaced to fall the same distance as on object of similar mass which has a more stream line shape. Size- Larger blades on the spinner would mean more potential energy would be dissipated acting like a parachute and making it fall slower. The opposite happens with smaller blades. Speed- By using the fact that at terminal velocity Drag is equal to weight. I can calculate the speed by weighing the spinner with different masses. Doing this I can investigate how terminal velocity is effected by weight. Another factor that could be considered is air conditions. Aeroplanes/gliders perform differently when it is raining than when it I sunny. Is this also try for spinners? One of the problems when investigating this is that it would be difficult to keep the other variables constant. ...read more.

Middle

I intend to try and prove this theory or to find out what is actually happening to a spinner's drag. Results The know formulae I have used to calculate a formula for terminal velocity relies on the fact that A (acceleration) is constant, meaning that the spinner accelerates at the same rate until it reaches terminal velocity. Constant acceleration requires a constant resultant force, resultant force can be calculated by subtracting the drag of an object when falling from its weight. During acceleration the weight remains constant, however the drag increase until terminal velocity is reached; this means that the resultant force decreases as the spinner gets nearer to terminal velocity. As the resultant force is not constant, I can not presume that acceleration is also constant. The formula I used all assume A as a constant, this means that my equation for Vt and the results I have based my conclusions on are likely to be slightly incorrect. If I had taken into consideration the effect of resultant force on drag in my equations the results would be more reliable. Weights: 1 paper clip = 0.41g 1 paper clip with spinner =1.09g 2 paper clips = 0.81g 2 paper clips with spinner = 1.48g 3 paper clips = 1.19g 3 paper clips with spinner = 1.86g 4 paper clips = 1.58g 4 paper clips with spinner = 2.25g 5 paper clips = 1.96g 5 paper clips with spinner = 2.63g 6 paper clips = 2.35g 6 paper clips with spinner = 3.02g Spinner = 0.67g Height of ceiling = 2.75 cm Mass of spinner No. ...read more.

Conclusion

Evaluation I am fairly confident that my results are accurate as I did them several times and used a balance that calculates mass to one hundredth of a gram. I also made sure we used the same make of stopwatch each time. A factor, which could have effected the accuracy of my results, is human reaction times and human error. This will mean that the results are slightly out however as this was the same for each of the different masses of the spinner I feel I can still draw some accurate conclusions. We identified anomalous results as we went along, repeating the drop and using these new results to work out the averages not the anomalous readings. I would think these anomalous readings were due to human error. As a result of identifying anomalous readings as I went along my final graphs have no points which are not on or very close to the line of best fit. My results are fairly consistent, there is not a lot of variation. I feel that with more evidence to support my prediction I could be 100 % sure that my conclusions are accurate, however we only used six different masses of spinner so I can not be altogether certain that the conclusions I have drawn are correct. I believe my results back up the predictions I made adding evidence to my theories. I think that to improve the validity of my conclusion I should have found a way of tacking more times and points to plot on my graph. This would make me more confident that my conclusion is as accurate as possible. ?? ?? ?? ?? 4 1 ...read more.

The above preview is unformatted text

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

See related essaysSee related essays

Related GCSE Forces and Motion essays

  1. My investigation is about how the number of paperclips added onto a paper spinner ...

    and drew out the shape of the spinner with a pencil and ruler, this was important so that I knew what bits I had to cut out and how my spinner would look. Then I cut it out with a pair of scissors and folded the card to make it a spinner and attached a paperclip that weighed 0.43 grams.

  2. Trolley Speed

    Anybody found doing so will be permanently banned." suhura, please do not redistribute this dissertation. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this dissertation elsewhere on the internet.

  1. Discover the effect that height and weight have on terminal velocity.

    This is for the following reasons. If we say that terminal velocity is, Force of gravity (weight) = Force of air resistance Downwards Upwards Then the heavier the falling object, the faster it will be going before, the air resistance equals its self out.

  2. Squash Ball and Temperature Investigation

    the testing should be fair as the air resistance will also be the same. * Amount of Air in Ball Different balls will be able to hold different capacities of air and so using one ball will ensure that its air capacity is the same throughout the experiment.

  1. In this experiment I aim to find out how the force and mass affect ...

    that makes up P.E: P.E = mgh P.E = mass x gravity x height So the higher an object goes, the more gravitational potential energy it gains. When it falls, it�s potential energy is converted into kinetic energy and; since energy can neither be created or destroyed, only converted; it will move at a faster speed.

  2. The aim of this experiment is to investigate the relationship of the height of ...

    It will act on both vertical and horizontal motion and will reduce the distance it travelled. The distance will varies and this is the reason for me to take the average. Adjustment: A pre-test is done before the actual experiment and I would like to make some adjustment of my apparatus.

  1. Investigating the amazingness of theBouncing Ball!

    store very little and therefore have low resilience. The squash ball , being made of a rubber compound, is of fairly low resilience. Unfortunately, the lower the the resilience of an object, the higher the proportion of energy used in deforming it must be dissipated. When the squash ball is heated up, it has two effects on the

  2. Investigation into the effect of temperature on viscosity

    If any honey should be lost it can be topped up to the pre-marked line, it should then be stirred to help maintain a constant temperature throughout the substance. 9) Experiment repeated until an adequate amount of results are gained.

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