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Bouncy Ball Experiment

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Bouncy Ball Experiment

Aim:
The aim of this experiment is to investigate the efficiency of a bouncing ball, and the factors which affect its efficiency.

Prediction I predict that the higher I drop the ball from the higher it will rebound up, because it will have more gravitational potential energy the higher dropped from. As it is dropped the ball will have kinetic energy, and then when it hits the ground changes to heat and sound energy, and kinetic as it rebounds back up. The higher up the ball is dropped from the more gravitational potential, more kinetic energy on the way down and therefore more sound heat and kinetic energy when hitting the ground. The ball will bounce higher the higher dropped from as the energy has to go …show more content…

 I dropped the ping pong ball from 25cm and recorded the rebound height against a ruler.
 I repeated this at 25cm 3 times as I did with every height to make the results more accurate by using an average.
 I went up in 25cm dropping 3 times at each height up to 2m.
 To make the experiment fair the height that the ball is dropped from is the only variable that will change. Other variables (type of ball, surface dropped on) won 't change to keep the experiment fair. I then worked out the efficiency of the drop by this equation Height at end Height at start x 100 = efficiency

 I then recorded down my results working out an average and efficiency; put this data into a table and a graph. Before reaching my conclusion.

Results

Height (cm) 1st drop (cm) 2nd drop (cm) 3rd drop (cm) Average (cm) Efficiency (%)
25 21 20 19 20 80
50 44 37 33 38 76
75 43 51 50 48 64
100 61 65 68 64.66666667 64.66666667
125 73 73 71 72.33333333 57.86666667
150 80 81 81 80.66666667 53.77777778
175 92 90 89 90.33333333 51.61904762
200 102 99 103 101.3333333 50.66666667

Conclusion

As I increased the height that I dropped the ball from I found that the ball bounced to a greater height.
This is because it had more gravitational potential as the height increased so this means it has greater kinetic energy making it bounce higher.
As I increased the height that the ball was

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