![]() Carpet makes the ball lose the most heat/sound energy. This is due to its roughness and material. The ball just died out as soon it hit the carpet. More energy than the wooden surface is being lost by heat/sound energy, but less is being lost than the carpet surface. The cork surface, being in between carpet and wood I terms of roughness, turned out to be second best. This means that there is more kinetic energy, which would mean that the ball would bounce more. The reason for this is because less energy is lost as heat/frictional energy. The wooden surface, being the smoothest of the three, proved to make the bouncy ball bounce highest. These characteristics as well as the bounce surface influence how well or badly a ball will bounce. Some examples are: size, weight, material, etc. There are many factors that a ball may have to influence its bounce. Conclusion: There are many reasons to why I got the results I did. Never did the rebound height remain constant when if the drop height was changed. As I increased the drop height, the ball bounced a considerable amount higher. I also noticed a relationship between the drop height and the surface used. They look absolutely identical but there are minute differences. Both of the graphs I have drawn are very similar in shape. Carpet is extremely rough in texture causing more friction when the ball hits it, which in turn causes more energy loss. ![]() The reason for wood being better as a bouncing medium is because it is much smoother than the other surfaces. Formula: Gradient = x/y Line of best fit Graph of drop height vs rebound height: Carpet Surface:Īs you can see from these sums, Wood has the greatest gradient, whereas carpet has the worst. To prove that the best surface is wood I worked out the gradient of each line. It was easy to spot which surface made the bouncy ball bounce highest. I got these facts by looking at the line graphs shown previously. More Gravitational Potential Energy is stored in the ball when the drop height is increased. The bouncy ball bounced higher as you increased the drop height. The bouncy ball bounced most on the wooden surface. Results Analysis: Using my results, I found out many things: Another thing that I predict is that when the Drop height is reduced, the rebound height also is reduced. I think the Cork surface will come between the two, because it is rougher than wood, but smoother than carpet. I also think that Carpet will be the worst surface of the three, as it is a very rough surface, which is likely to make the ball lose a great deal of heat/frictional energy. This is because wood is the smoothest surface out of the three, meaning that less energy will be lost as heat/friction and so more will be put in to the actual bounce of the ball. Prediction: I predict that the bouncy ball will bounce furthest on the wooden surface. Work out the averages of all your results.
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