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# what happens to the energy in a boucing ball

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Introduction

In my science general coursework I will be answering the question "What happens to the energy in a bouncing ball?" We all know that when we drop a ball from a height it wont bounce back to the original drop point, but do you know why? This must mean that the amount of energy it started off with is lowered. Where does that energy go? These are all the questions I will be answering by using sources such as textbooks and notes, the marking grid, books in library and the internet. My method for collecting data was very simple. I used two one metre rulers and a tennis ball! By dropping the ball from a range different heights I could put the data into a graph and see if there was a relationship. ...read more.

Middle

potentional energy energy at bonce point 2.00 1.14 1.15 1.15 1.15 1.15 0.053 1.06 0.61 1.90 1.09 1.10 1.08 1.10 1.09 0.053 1.01 0.58 1.80 1.03 1.03 1.05 1.06 1.04 0.053 0.95 0.55 1.70 1.00 1.01 0.99 1.01 1.00 0.053 0.90 0.53 1.60 0.95 0.95 0.94 0.95 0.95 0.053 0.85 0.50 1.50 0.86 0.87 0.87 0.86 0.87 0.053 0.80 0.46 1.40 0.80 0.81 0.82 0.81 0.81 0.053 0.74 0.43 1.30 0.79 0.80 0.78 0.77 0.79 0.053 0.69 0.42 1.20 0.72 0.72 0.74 0.72 0.73 0.053 0.64 0.38 1.10 0.70 0.69 0.69 0.68 0.69 0.053 0.58 0.37 1.00 0.62 0.62 0.61 0.63 0.62 0.053 0.53 0.33 0.90 0.58 0.59 0.58 0.59 0.59 0.053 0.48 0.31 0.80 0.46 0.47 0.49 0.48 0.48 0.053 0.42 0.25 0.70 0.42 0.43 0.42 0.42 0.42 0.053 0.37 0.22 0.60 0.38 0.35 0.36 0.38 0.37 0.053 0.32 0.19 0.50 0.30 0.30 0.31 0.31 0.31 0.053 0.27 0.16 0.40 ...read more.

Conclusion

Page 4 When the ball is travelling through the air there is friction against the ball. friction causes heat (a source of energy). When the ball hits the ground it uses abit more energy in the bounce, the ball compresses a bit and makes a sound. (another source of energy) and the friction caused when the ball bounces back up. These sources of energy all adds up to the 42% of the balls energy that is lost. Looking at my data and graphs I can definatly see that there is a loss of energy in the ball when it is dropped from a height. More detailed research showed that the energy was lost in the bouce, sound, friction whilst falling and friction whilst bouncing back up in the air loosing roughly 42% of the balls original energy. This is where the energy goes. That is why the ball doesn't bounce to its original height, because of bounce, sound and friction. ?? ?? ?? ?? 17-03-05 Science genral coursework Matt Rideout ...read more.

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