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Bouncing Balls

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Introduction

Bouncing Balls Introduction On behalf of the rival manufacturer of "MEGABOUNZ" I will conduct an experiment to test the bounciness of the "MEGABOUNZ" bouncy ball. Planning For my experiment I will be considering how the length of time the ball bounces for changes as the height the ball is dropped from differs. I will compare the bounciness of the ball by timing how long the ball takes for it to be completely still from the moment the ball is dropped. The height will start at a low height of 10cm and will add 10cm's to the previous height that the ball was dropped from. The height will continue to rise until it reaches 100cm's. Apparatus Method The apparatus will be set out as shown above. The ball will be dropped from every 10cms on the measuring stick until the height reaches 100cms. The ball is dropped and at the same time the stopwatch is started. The stopwatch is then stopped when the ball has finished moving the results will be recorded in a table below. ...read more.

Middle

The greater the kinetic energy is the larger the bounce of the ball will be, therefore leading to a greater amount of gravitational potential energy at the top of the bounce. This process then continues until there is no energy. A diagram is provided to help explain the process. Possible Sources of Error Throughout the experiment lots of errors could be made, therefore when I do my experiment I will take extra care in the following areas. The measuring stick could be at a slant and would therefore perhaps not be exactly the correct height for each time the ball is dropped, to overcome this I could measure this up a level straight edge for example a wall or flat surface. The ball may not be exactly the correct height as the angle from which the person measuring the height may be not in line with the ball, I would overcome this by making sure when measuring the height of the ball I will keep my eyes in line with the ball and measuring stick. ...read more.

Conclusion

The measuring stick was not exactly vertical as it could have tilted to one side and we had no means of proving this. If I were to repeat the experiment I would line it up with an exactly vertical straight edge. There may have been changes in temperature, which speed up or slow down reactions causing the results to be slightly inexact, to overcome this I could have done my experiment in controlled conditions preventing any temperature changes. There was a door near by which was in use often causing small but effective jets of air to this may have disturbed the experiment, if I was to repeat this again I would use a sealed area preventing all air movement from disturbing my experiment. The surface of which the ball was bouncing on may not have been exactly horizontal therefore causing the ball to move to one side, perhaps a more horizontal surface should have been used. However the experiment is set up it will be extremely difficult to get the exact results through the conditions being so difficult to make perfect, although the results I got are a good reflection on what the perfect results should be. ...read more.

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