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

I aim to find out if the mass of an object affects the speed at which it falls.

Extracts from this document...

Introduction

Falling Objects

Plan

I aim to find out if the mass of an object affects the speed at which it falls.

I predict that the mass will not alter the speed, as it will reach terminal velocity. I think that all the results will stay roughly the same even though I have changed the mass. When something falls, its potential energy is changed into kinetic energy. Therefore the only thing in this experiment that could alter the speed at which it falls is the air resistance and the height. (These would change the time at which the object is in the air). Theoretically, as I am keeping these the same, the speed should not change.

The scientist Galileo proved this.

This is a quote taken from the Galileo Timeline. (http://es.rice.edu/ES/humsoc/galileo/galileo_timeline.html)

"1589-1592 Teaches mathematical subjects at the University of Pisa (salary 160 scudi per year). Some tracts--lecture notes--written during this period have survived. In OnmotionGalileo uses the Archimedian approach to motion: the speed of falling bodies is proportional to their density, not their weight as Aristotle had maintained.

According to Vincenzo Viviani

...read more.

Middle

Results

Weight (g)

Speed m/s (2.D.P)

Average m/s

1

2

3

10

2.15

2.10

2.22

2.157

15

2.33

2.23

2.21

2.257

20

2.04

2.05

2.24

2.110

25

2.28

2.27

2.24

2.263

30

2.09

2.10

2.30

2.163

35

2.22

2.21

2.06

2.163

Total

2.185555556

As you can see I have taken three sets of results for each mass and used the average, to make my results accurate.

Analysis

My results have proved my prediction, that the mass would not affect the speed. This is made clear by this scatter graph, with a line of best fit.


image10.png

To prove

...read more.

Conclusion

If I used a mechanism to drop the object this would help eliminate spinning. However, the sand was sometimes uneven inside the container so this would make the object spin at the start. The other problem with spinning was that the object would have fallen faster when it spun because it would have less air resistance. It would have been more accurate if I had used weights of the same size but different mass, instead of sand.

Also, when I dropped the container, I may have not dropped it from exactly the same distance every time. I also may have added force to the object with force when I dropped it. The mechanism would have also stopped this.

This would be a diagram of the mechanism I would use if I were to do it again.

image01.pngimage03.pngimage02.png

image03.png

image04.png

image05.png

When I pull the string, the mechanism would drop the object evenly.

Even with all these minor problems my results are still very accurate.

I now know for a fact that my prediction is correct because I have proved it in 3 different ways,

  • Using a practical test (experiment)
  • Using theoretical calculations (The formulas)
  • Using other people results as well as my own.

Daniel Hill 10S        25310.doc        Page  of

...read more.

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

Here's what a teacher thought of this essay

3 star(s)

This is a good report of an investigation
1. The report is well structured, although the plan could be broken up to include additional subheadings.
2. The prediction includes well researched science.
3. The evaluation is the strongest section of the report.
4. The analysis contains good calculations, although this needs to be compared to the results that have been obtained.
*** (3 stars)

Marked by teacher Luke Smithen 22/05/2013

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. Marked by a teacher

    The aim of this experiment was to compare the elasticity of arteries and vein ...

    4 star(s)

    The experiment needed to be able to produce results on equal grounds for the arteries and veins, showing how the elastic recoil could be shown after a significant force had been applied, and removed, from the vessels. The method below shows how the experiment was carried out.

  2. Investigate to see if adding mass to a cupcake case will increase the speed ...

    Preliminary Work For the experiment I am going to measure the rate at which a cupcake case falls to the floor. I am going to try to find out, by changing the mass of the cupcake cases, if the speed at which they accelerate affected.

  1. How does the weight of an object affect the friction it has on the ...

    5. Preliminary work This experiment is investigating how the weight of an object affect the friction it causes on a surface. To do this, I am going to use two methods and compare the results, to find out which one is the more precise and reliable to use in next parts of the experiment.

  2. Investigate how the weight of an object affects the force required to overcome friction.

    and the mass of the object. I predict that the heavier the object is when on a particular surface the more force will be required to overcome friction. I also predict that the static and dynamic friction will be directly proportional to the weight of the object pressing down onto the surface.

  1. Investigation into how mass affects the rate of fall of cup cakes.

    I've chosen to drop the paper cup in an upright position (\__/) because it is more streamline and so the particles in the air can travel at an equal velocity and low frictional drag.

  2. 'To investigate whether the amount of paper cup cake holders affects the time taken ...

    cup cakes from the same height of 4.6 metres at the same angle. * Dropping each one 3 times and then finding the average. * Use the same size and type of cake case each time. * Make sure the same conditions are kept constant throughout.

  1. How does an increased surface area change the time taken for a mass to ...

    Also the object will accelerate until it reaches a constant velocity, where it will drop at approximately (with experimental error) the same velocity but this constant velocity will change for both cup cakes due to the its surface area. The larger cup cake with the larger surface area will drop

  2. Report on Newton's laws of motion

    If all the external forces cancel each other out, then the object will maintain the same state of motion (constant velocity). Now, if the velocity is zero, then the object remains at rest. Thus, if an additional external force is applied, then the velocity will change.

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