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

What Factors Affect the Bounce of a Squash Ball.

Extracts from this document...

Introduction

Physics Coursework

What Factors Affect the Bounce of a Squash Ball

Introduction

        For my physics coursework, I have been asked to investigate the factors which affect the way in which a squash ball will bounce. I looked into a few different factors, including; Heat of the ball, landing surface of the ball, and in depth: the height from which the ball is dropped.

        To observe how the height a ball is dropped from affects the height the ball bounces back to, we put a meter stick against a wall, with another one directly above it (two meters tall). We then held the ball so the bottom of it aligned with the height we were planning to drop it from (.80 m, 1.00 m, etc) and released it. Meanwhile, another member of our team was lying on the floor facing the meter stick, and observed, from ground level, how high the ball rebounded.

We dropped the ball at .2 m intervals between 0.6 and 2.0 m (0.6, 0.8, 1.0, 1.2, etc). We dropped the ball from the same height five times in order to account for anomalous (or ‘misfit’) results, and to keep it a fair test. One more thing we did to try and enforce a fair test was to heat the ball to 40 degrees Celsius after every five drops.

...read more.

Middle

        In ‘i’, the ball has hit the ground, and because of inertia, the ball tries to keep moving and can’t because the ground beneath it is solid. This causes the ball to change to a sort of ‘oval’ shape, this change of shape causes some energy to be lost as heat and the kinetic energy to become Elastic Energy. Also, the ball hitting the ground will cause some energy to go on as sound and some will be sent through the surface as a wave.

        In ‘ii’, the ball is still, and has no energy other than Elastic Energy; it is exactly between ‘i’ and ‘iii’.

        In ‘iii’, The Elastic Energy is being converted to Kinetic Energy, and causes the ball to go from the ‘oval’ shape, back to its original shape, and bounces off of the ground. The Elastic Energy in the ball is now becoming Kinetic Energy again and the reshaping of the ball causes some more energy to be lost as heat.

4

        Here the ball is going back up after bouncing off of the ground. The ball has Kinetic Energy, and again some energy is lost as heat due to friction between the air and the ball.

5

        At this stage, the ball is stationary in the air because gravity has prevented it from rising any further.

...read more.

Conclusion

Ball Speed

        Epg = Ek on impact. To work out the velocity (speed) of the ball on impact we would use the formula v=√Ek ÷½m. First we need to know the value of Ek which is dependant on Epg (If Epg = 0.006J, Ek = 0.006J). For 1.0m we would find the square root (√) of Ek (at 1.0m Ek = 0.006J). The square root of 0.006 is 0.078. So we have v=0.078 ÷ ½m. ½m = 0.012. So v=0.078 ÷ 0.012. 0.078 ÷ 0.012 = 6.5. Therefore speed at impact of a ball dropped 1.0m = 6.5 m/sec.

Evaluation

        There are just two anomalies, they are at 1.4m and 1.6m, they is quite far from the line of best fit. I believe the cause was human error – perhaps in the inaccuracy of trying to see how high the ball was in a fraction of a second.

If I had the chance to repeat this investigation, I would improve the procedure by improving the measuring system, perhaps by using a digital video camera to record how high the ball bounced and then playing it back frame by frame on a computer because it is very hard to see where the ball is in a fraction of a second with human eyesight.

        I would increase the range of results to be from 0.2m – maybe 5.0m, because it would give a much larger range, in which perhaps the rule of the ball bouncing higher when dropped from higher would be incorrect.

Alex Powell    Physics    Mr. Smith

...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.

    30 31 33 31.3 0.8 41 39 48 42.6 1.0 51 52 60 54.3 1.2 63 61 69 64.3 1.4 78 80 80 79.3 1.6 85 86 89 86.6 1.8 93 99 95 95.6 2.0 105 106 106 105.6 Height (m)

  2. Physic Coursework - Squash ball experiment

    As well as coinciding with my prediction, the results agreed with the collision theory. Which is when the ball's temperature is increased, the atoms in the ball gain more energy and move much faster. Therefore when the temperature is decreased the reverse affect would happen.

  1. physics of the bouncing ball

    I will also need to make sure the surface is the same each time. Measure the bounce height from the bottom of the ball. This will make sure I measure the height correctly and evenly each time I drop the ball. Apparatus * 2 Meter rulers * Hard surface (e.g.

  2. Does the height a ball is dropped from affect its efficiency?

    In my actual test I will have to drop the ball more than once to get an accurate reading. I have repeated this test to see if I could get a more accurate reading but it sill has anomalies. Number of bounces Height dropped from (cm) Height bounced to (cm)

  1. Physics ball bearing investiagtion

    Conclusion; - I think my results are quiet accurate, although I don't think they are 100%, as a number of things could have happened, like what I mentioned above.

  2. Physics Coursework Gravity Investigation

    more the ball compresses and the more strain potential energy the ball has. The strain energy causes the ball to expand creating the ball to exert another force pushing off from the floor. The forces are now unbalanced and the ball thus ascends to its' bounce height.

  1. An Investigation into the factors of what affects the height at which a dropped ...

    I thought this was incorrect because it is a lot higher than the other two results from the same height and also it was higher than all the drops from the next height, which suggests that the height may have been read wrong.

  2. Find the realtionship between gravitational potential and kinetic energy

    small as compared to the others * Ensuring that the laser beam went through the middle of the ball: put the laser equipment atop a wooden block, to keep level with ball * Accuracy of final velocity: conducted three trials for each height Results: The results obtained were as accurate

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