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An Investigation To Find Out The Relationship Between The Bounce Height And Drop Height Of A Ball.

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Natasha Williams

An Investigation To Find Out The Relationship Between The Bounce Height And Drop Height Of A Ball.

Aim : I am going to find out the relationship between the bounce height and                    the drop height of a ball.

Preliminary Work

I am first going to do a preliminary experiment to determine what the best heights are to drop the ball from and to see what type of ball will give me the best results.

Equipment : 2 types of ball- a ping pong ball

                                            - a bouncy ball

                     a metre stick



Plan : I am going to use two types of ball ; a ping pong ball and a rubber bouncy ball. This will give me two tables of results so that I can compare them and decide which ball to use in my actual experiment. I will tape a metre stick to the edge of a bench with cellotape so it will be kept steady. I will drop each ball from five different heights ; 50cm, 40cm, 30cm, 20cm and 10cm. I will get a friend to drop each

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Safety : I will secure an area around the metre sticks that no-one else, apart from me, will be allowed in. So that if the ball bounces off at the wrong angle no-one will be hurt. I will make sure that I bounce the ball on a smooth surface so that the ball will bounce straight back up to me.

Fair test :To keep the experiment a fair test my only variable will be the height that the ball is dropped from. I will use the same ball for each experiment because another ball could produce a different result and I will have the same person dropping the ball each time.

Prediction : I predict that the ball won’t bounce back up to it’s original height and that the height I record for the bounce will be lower. I predict this because the ball will have lost some of it’s energy during it’s journey and won’t have enough to get back to it’s starting height.

Scientific evidence :Before a ball is

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The results I got were quite accurate apart from the anomalies because I did the experiment three times and the results were all quite close together.

If I were to do this experiment again with any equipment I would use a camera to film the ball bouncing and then I could calculate where the ball bounced to before it fell back down. This would make the experiment more accurate.

The experiment was as much of a fair test as I could get it but it probably could of been fairer. I used the same ball on the same surface but sometimes the ball wasn’t dropped from the same height each time so it could’ve been a few centimetres different. Also on some occasions the ball could’ve bounced off at a different angle.

In conclusion the drop height does effect the bounce height so that the higher the drop height, the higher the bounce height.

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This student written piece of work is one of many that can be found in our GCSE Height and Weight of Pupils and other Mayfield High School investigations section.

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