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# To See if the temperature of a squash ball and the height it is dropped from affects the height of the bounce and amount of energy used up.

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Introduction

Investigation: To See if the temperature of a squash ball and the   height it is dropped from affects the height of the bounce and amount of energy used up.

Choice of Equipment:

I have chosen to use a video camera to measure the bounce of the squash ball. A Meter ruler to measure the height the ball is to be dropped from and the height of the bounce. A heat proof mat, tripod stand, a beaker, a Bunsen burner and a thermometer to use as a water bath to heat the squash balls to set temperatures. I also need a clamp stand to hold the ruler vertical to improve the accuracy of my measurements. Precision scales to measure the mass of squash ball accurately. I will also need a constant surface to drop the ball onto to make the results fair. This is because if one time the ball drops onto a groove or a uneven surface more energy cud be wasted and the results wouldn’t be fair.

Preliminary Work:

Middle

I also know that as temperature increases, the molecules in the ball gain more energy and begin to move more, as the molecule vibrate more and as rubber has a positive temperature coefficient the ball has more energy the hotter it becomes. This increase in energy should increase the height that the ball bounces as it will have more energy in total as it initially reaches the ground than a cooler ball would.

Method:

1. – Collect equipment listed above and set up appropriately making sure ruler is perpendicular to the horizontal surface the ball is to be dropped on to, by using a set square and level.
2. – Weigh the squash ball 3 times on the scales and take an average of the masses. This mass will then be used as the mass of the squash ball.
3. – Place the squash ball in the Water bath and heat to the desired temperature (30 then 35 then 40 then 45 then 50 degrees).
4. – While waiting for the ball to reach the temperature desired,

Conclusion

## Safety

To ensure the safety of everyone around I will firstly work in a clear area. I will also be vigilant and watch the experiment to make sure nothing is going wrong. As my experiment involves fire I will keep all flammable things away from my experiment and will also use tongues or tweezers to pick the squash ball out of the heated water to avoid burning my hands. Finally I will remove all obstacles around my experiment such as chairs and bags to avoid people tripping up and accidentally injuring themselves.

## Bibliography

Textbooks – A level physics (Roger Muncaster)

Physics One

Websites – squash association website

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