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How temperature affects the bounce height of a squash ball.

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Introduction

Sandeep Brar 10D2

Aim:

How temperature affects the bounce height of a squash ball.

Prediction:

 I predict that the warmer the squash ball is the higher the bounce height of a squash ball will be.

 Apparatus:

  • water from a kettle
  • kettle
  • ruler
  • clamp
  • clamp stand
  • beaker
  • squash ball
  • thermometer

Diagram:

Sandeep Brar 10D2

Method:

  • Collect all the equipment needed for this investigation.
  • Set up the equipment as shown in the diagram.
  • Pour water from the kettle into the beaker until it is half full and put a thermometer in the beaker to measure the water’s temperature.
  • Put the squash ball in the beaker for a set amount of time and take down how warm the water is by looking at the temperature reading.
  • Decide on a drop height for the squash ball. Use this drop height throughout the whole investigation.
  • Write down how high the squash ball bounces.
  • Record the bounce height in a results table alongside the squash ball’s temperature.
  • Put the ball back in the beaker.
  • Repeat this method another seven times.
  • Each time drop the squash ball from the same height but the squash ball should be at a different temperature each time it is dropped.
  • Once you have collected all your results draw a graph showing your results.
...read more.

Middle

                           Weight

Sandeep Brar 10D2

image02.png Potential Energy

                                                                          Kinetic Energy

                              Surface Friction                    Losing energy to the surface

As the squash ball bounces gravitational potential energy is converted into kinetic energy as the ball is falling down and when the ball touches the surface it loses energy in the form of heat and sound energy. The squash ball also loses energy because of friction on the surface.

This is why a ball can never bounce back to it’s original position form where it was dropped from.

The Law of Conservation of energy is:

Energy can never be crated nor destroyed- it can only be converted from one energy type to another.

Anything which is moving has kinetic energy and potential energy is energy due to height.

There are a number of different types of squash ball and they all have different pressures inside them. Boyle’s Law is-if you squash a gas into a smaller space, the pressure goes up in proportion to how much you squash it. So if I had squashed the squash ball to half it’s size the pressure inside it would double.

Variables:

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Conclusion

I could have improved my investigation a number of ways. I could have used a squash ball with a different number of dots or a squash ball with different colour dots, instead of the two dot yellow ball I had used. I also could have tried dropping the squash ball from a different height to see what affect that would have on the ball’s bounce height. I could also have used different temperatures for the squash ball. e.g: room temperature of 23 degrees centigrade.

If I had another chance to carry out this investigation then I would also would have repeated the investigation to compare results. I would also repeat individual bounce two or three times to make sure the results are correct and it is a fair test.

To make the investigation a fair test I used the same drop height and same squash ball throughout the whole investigation. Next time I could time how long the squash ball is put into the water each time to make the investigation and results more accurate.

...read more.

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