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# Investigation into the affect of radius length On the speed and time period of one orbit.

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Introduction

Oliver Lamb Investigation into the affect of radius length On the speed and time period of one orbit There are many things that will affect the out come in this experiment, the mass of the object in orbit, the length of the radius, gravity mulling it down to the centre of the earth, friction on the string in the rotation axis. I am going to look at how the radius affects the speed of one orbit. I predict that as the radius increases the time taken for one orbit will also increase. In fact if the radius doubles the time also taken for one orbit will also double. If we draw an arc of a circle with its centre of rotation at the apex of the angle ?, then the length of the arc (s, or 2s or 3s) ...read more.

Middle

Using the sop watch we then timed the time taken for 10 complete orbits of the bung. We did this 4 times each and then took an average of all 4 sets of results to make a more reliable set of data. The data I have recorded is in the table below. Radius 10 15 20 25 30 35 Exp1 a 6.66 7.19 8.88 9.65 11.19 12.24 Exp1 b 6.72 7.47 8.47 9.44 11.35 11.59 Exp2 a 6.53 7.04 9.50 9.44 11.22 11.75 Exp2 b 6.56 7.50 9.59 9.75 10.84 12.00 Average 6.61 7.30 9.11 9.57 11.15 11.89 I have plotted all of my on to graphs to make them understandable and easy to look at. ...read more.

Conclusion

In experiment's 2a and 2b there are 2 anomalous results this is because the person that is spinning the bung could have speed up. The readings could only be take at the rate the speed the data travels to the eye and your brain tells you to click the stop on the stop watch. This could be improved by using a laser stopwatch as this travels at the speed of light and is as fast as you can measure. If I were to look at this experiment and expand the research I could look at a number of other factors that will affect the experiment and change them. I could look at the affect of different weight on the end of the radius, or the amount of tension in the nylon thread. ...read more.

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