• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Plan and execute an investigation into the energy changes of a table tennis ball in terms of the energy changes that occurs when it bounces on a rigid surface.

Extracts from this document...

Introduction

Andrew Dhushantha

Physics Coursework

 Planning Experimental Procedures and Obtaining Evidence

Aim:

        To plan and execute an investigation into the energy changes of a table tennis ball in terms of the energy changes that occurs when it bounces on a rigid surface.

Equipment:

        To conduct this experiment the following equipment will be required:  two-metre rule, clamp, boss, stand, and ping-pong ball.

Diagram:

(DIAGRAM)  - cant email diagrams – too much bytes

Method:

First of all the equipment is assembled as shown in the diagram above. The ping-pong ball is dropped from two metres above the ground. It is dropped from here, as this is where air resistance starts to be tested, I know this through the result of my pliminary experiment. When dropping the ball the first time you must be careful to measure exactly two metres from ground level. When dropping the ball from two metres, the bottom of the ball must be at two metres above the ground. You must look at the bottom of the ball with your eyes being at the same level as the bottom of the ball. This is done to obtain very accurate results.

        Next drop the ball from the desired height, first record the general height of the bounce of the ball.

...read more.

Middle

Quality of ballSize of ballWeight of ball

Out of all these variables I chose to vary the height of the drop, because this was the easiest factor to vary.

        As the ball is dropped higher from the ground the ball will become less efficient as it loses more energy to air resistance. Yet eventually the ball will reach its terminal velocity. The ball will also lose more heat on impact with the surface when dropped further away from the ground. Wit this information we would expect a graph with slight curve downwards towards the axis of drop height, as we get closer to 0mm away from the ground.

Results:

(TABLE)

Preliminary Experiment:

        I conducted a preliminary experiment in order to get a rough idea of when air resistance has considerable affects on the ping-pong ball. In my preliminary experiment I got a ping-pong ball and a golf ball, I then dropped them together, from different heights until I could hear two different bounces, i.e. the balls hit the ground at different times. The heavier golf ball would be less susceptible to air resistance than the lighter, less dense ping-pong ball. I needed reasonably accurate results to help me with my proper experiment.

...read more.

Conclusion

        When recording the height of the ball, results could have been more accurate. For example, a video camera could be used so that it could be played at slow motion and the very accurate result could be recorded. Wider rulers could be used so that even if the ball is dropped to the side, the proper measurement can clearly be seen.

        Some further work could be conducted for this experiment. The ball can be tested to see if it can reach terminal velocity. This would mean dropping the ping-pong ball from very high places, for example, the top of a building. A ruler can be painted vertically up the building so that when the ball bounces, a camera can be used to record the bounce of the ball. This recording can then be slowed down so that a more accurate reading can be obtained. This might not be very practical though because the wind may blow the ball away, so the experiment could be conducted in a very calm day.

        When the ball bounces up, does air resistance still affect it? This could be found out by seeing how efficient a ball is when dropping from 1 metre. Then its efficiency can be measured when it bounces up to 1 metre and then drops and bounces back up. This will tell us if the ball loses energy when bouncing upwards.

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Electricity and Magnetism essays

  1. Investigating the relationship between drop height and bounce height when a ball is dropped.

    You can patterns occurring and also see where mistakes were made and need to be fixed. First of all I am reasonably happy with the results except maybe a few values, but then again nothing is perfect and without mistakes, it makes your evaluation shorter.

  2. --- PHYSICS INVESTIGATION ---

    This explains why the results were directly proportional. For example a wire that was 10 cm long may have 500 atoms blocking the electrons. Therefore in a wire 20 cm long, there would be 1000 atoms meaning that the resistance had doubled.

  1. Investigating the Percentage Energy Loss When a Ball Bounces

    For this investigation I will only change the height the ball is dropped from. I have chosen to use the height because, although all the variables are hard to accurately measure, height is easier than the others. Height is also a constant variable (unlike, type of ball or type of

  2. physics of the bouncing ball

    Next time round I would use a more precise balance, even if it were only to 2 decimal places. Working too quickly can cause inaccuracy so I will need to use the time wisely in order to get the best results to support or undermine my hypothesis.

  1. Planning Experimental Procedures

    I will control variable 3, which is the diameter of the wire by cutting the wire at 90 degrees as I have just mentioned for variable 2. I will control variable 4 by using a thermometer to keep the room temperature constant.

  2. Physics ball bearing investiagtion

    = 1/2 x mass x velocity´┐Ż The conservation of energy - energy can not be destroyed or created. How could I improve my results? - In my opinion the test that I did was a far test, but you can't be 100%, as someone could of added a little pressure

  1. Investigate how the height a ball is dropped from affects the re-bounce of it.

    Then the other ball I drop from 100cm bounces 70cm back, it has also lost 30% of its energy. I think this will happen because the higher I drop the ball from, the more force it obtains; therefore when it bounces it will lose more elastic/ strain energy and not

  2. Investigation on the factors that affect the bounce of a ball.

    As the temperature inside the squash ball increased, the rebound height increased. This was the case in all of the tests. Also using this CD I could investigate the different amounts of energy bring used up when a ball bounces.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work