The area of the triangle can be found using the formula below. A decrease in m, assuming g and h1stay constant, results in a decrease in m g h1which results A decrease in m, assuming g and h1stay constant, results in a decrease in m g h1which results in a decrease in GPE. Additional list of material can be extracted from the experiment section. This denting extracts energy from the balls motion and stores much of it in the elastic surfaces of the floor and ball. Improvements that could be made to the experiment if future work was to be done: To provide additional relevant evidence I would conduct further work as follows; I would like to conduct the same experiment in a vacuum. Drag is a squared function of velocity and therefore as the ball drops drag increases a greater amount each second. Also the difference between the force of air resistance acting upon a ball travelling at 1ms-1 and the force of air resistance acting upon a ball travelling at 2ms-1 is far smaller than the difference between the force of air resistance acting upon a ball travelling at 20ms-1 and the force of air resistance acting upon a ball travelling at 21ms-1. http://wings.avkids.com/Curriculums/Tennis/index.html. These two results were excluded when averages were being calculated and therefore the average variation between results used for calculating the average was even less than 3cm. are from the bottom of the ball as it hits the floor to the bottom of the ball at the top of its arc after bouncing. This will be a table tennis ball. \(v^2 = 2 \cdot g \cdot hv = \sqrt{2 \cdot 9.81 \frac{m}{s^2} \cdot 3 m} = 7.67 \frac{m}{s}\). The CoRs apply to balls dropped or thrown at a rigid wooden surface. Instead, as the ball is still always loosing GPE so long as it is still falling, all GPE is converted into thermal energy. This was when the ball was falling in air. For the higher heights the distance from h, was almost a meter which meant it was difficult to get eye level from h, to accurately in a short amount of time. 15 inches, and the golf ball bounced 26 inches. This means that the higher h1the more h2will differ from the height that the ball would have reached had it been dropped in a vacuum. D (60%) However when the ball is dropped from a relatively low height, drag 0. A ball falls from a height of 6 metres. Dependent: - Height at which the tennis ball bounces. We also noted after we finished the experiment that the student taking measurements sometimes stood above the height when taking the measurement and sometimes kneeled on the floor so they had a different angle on the meter stick, which may have affected the measurement. This is considered raw data since it has not been processed or interpreted yet. 3. Use the same point on the ball (top) or (bottom) when judging both the height CoR = coefficient of restitution = (speed after collision)/(speed before collision). This would eliminate parallax error further. In my science fair experiment, the golf ball overall was the ball that bounced the highest. , v is greater therefore KE is greater by a larger amount). If the drag is less the ball will fall faster and is less likely to reach its terminal velocity. Discuss specifically how you developed your e and initial height values. Variables - The Tennis ball experiment 7. The energy chain is as follows: Therefore as energy cannot be created or destroyed the energy the ball starts with must be directly proportional to the energy the ball finishes with, at the top of its bounce, and so if the ball starts with more energy it must therefore finish with more. Course of Theoretical Physics : Mechanics (Course of Theoretical Physics), Engineering Mechanics Dynamics (11th Edition). An experiment has several types of variables, including a control variable (sometimes called a controlled variable). Also it will affect its bouncing properties. It was more reliable to use the middle three results as it automatically discounted any anomalies; assuming two similar anomalies were recorded for one height, if they were then they both would be discounted. Free Bouncing Ball Experiment Essays and Papers | 123 Help Me This means that we can approximately calculate the amount of energy that the ball conserves as it hits the floor and therefore the height to which it will bounce for any given height in a vacuum. This causes the amplitude of the height to reduce over time and eventually come to a stop due to friction forces like air resistance, which are assumed to be zero in an ideal scenario. The same square of tiling will be used throughout the experiment so that inconsistencies between different floor tiles do not affect results. Create flashcards in notes completely automatically. What you have learned may allow you to answer other questions. This is because it is the easiest and quickest variable to alter. When the ball was dropped from the higher heights the ball began to show signs of reaching its terminal velocity before it reaches the ground. Following are some sample information that you may find: Everyone has played with balls that bounce, but few people truly understand the physics behind a bouncing ball. The sum of the two, mechanical energy, stays the same ( is conserved.). Once the ball hits the ground, its displacement is momentarily zero. These conclusions help us confirm or deny our original hypothesis. This proves that the higher h1the more h2will differ from the height that the ball would have reached had it been dropped in a vacuum. The first stage is where the ball bounces from the surface of the ground. This applies to a ball falling in a vacuum. The second stage is the point at which the ball decelerates, changes direction once it has reached the peak point, and starts falling to the ground. This will be called the average of the middle three repeats. As the ball hits the floor with less KE than it would have done if it had been dropped in a vacuum it follows that less energy is converted into elastic potential energy and back into KE again. For the higher heights the distance from h1 to h2 was almost a meter which meant it was difficult to get eye level from h1 to h2 to accurately in a short amount of time. WebA) If a tennis ball is frozen, it won't bounce as high as one that is not frozen. WebOn the cardboard, mark the starting point, the point where the marble strikes the wood, and a point along the marble's path as it rolls away from the wood. Hypothesis: Based on your gathered information, make an educated Kinetic energy is energy of motion. However, they only stretch for an instant before atomic interaction forces them back into their original, tangled shape and the ball shoots upward. The maximum and minimum results were included when working out the variation between results however, seeing as the maximum and minimum results were produced by the experiment and are therefore part of the variation between results produced by the experiment. H is the height of the ball before it is dropped. Bouncing Ball Example: Experiment, Formula, Force, Motion Use two people to measure the results; one person to drop the ball and one to measure the height to which it reaches after bouncing. It bounces off, changing the direction of motion and again reaching its maximum height. Bouncing Ball Lab - Warren County Public Schools 8. You may now be able to understand or verify things that you discovered when gathering information for the project. Locate the peaks and record the time for each peak. Using the geometric sequence formula, the sum of the terms which are the heights of the ball after each bound: \(S_n = \frac{\alpha(1-r^n)}{1-r} = \frac{6m(1-0.38^5)}{1-0.38} = 9.6 m\). ball Summary of task. In a real-life scenario, the ball will eventually stop moving due to external forces such as air friction. Draw a graph of bounce height Vs drop height. Controlled: - Same ball. The push which the ball receives from the floor at the moment of impact causes it to bounce up from the surface. These inaccuracies could have been caused by external factors or parallax error even though efforts were made to avoid parallax error occurring - by dropping the ball one time that was not measured and placing a blob of blue tack onto the meter rule at the approximate height it bounced to. This project guide contains information that you need in order to start your project. If you follow the motion of either ball, youll realize that theres a moment halfway through its bounce when the ball is perfectly motionless in contact with the floor. Drop a ball from 1 foot off of the floor, slightly in front of a yardstick. TurnItIn the anti-plagiarism experts are also used by: King's College London, Newcastle University, University of Bristol, University of Cambridge, WJEC, AQA, OCR and Edexcel, Business, Companies and Organisation, Activity, Height and Weight of Pupils and other Mayfield High School investigations, Lawrence Ferlinghetti: Two Scavengers in a Truck, Two Beautiful People in a Mercedes, Moniza Alvi: Presents from my Aunts in Pakistan, Changing Materials - The Earth and its Atmosphere, Fine Art, Design Studies, Art History, Crafts, European Languages, Literature and related subjects, Linguistics, Classics and related subjects, Structures, Objectives & External Influences, Global Interdependence & Economic Transition, Acquiring, Developing & Performance Skill, Sociological Differentiation & Stratification. When the ball rebounds, its stored energy reappears and it leaps higher into the air than it would have had you dropped it a shorter distance. The terminal speed is the maximum speed reached when an object is dropped from a great height. The maximum height will have to be less than two meters as that is the maximum height that the equipment allows. Measuring the height to which the ball bounced on subsequent bounces would be interesting, seeing if h. The only difference is that no experimental variables are changed. It is used to determine what the variable changed. Ball The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. Bouncing balls experiment WebVariables. It travels upwards towards its highest point. Then when dropping the ball again eye level was kept level with the blue tack. This did not happen in my experiment however. No, as the acceleration is not proportional to the displacement. This project guide contains information that you need in order to start your project. At 3ft, the basketball bounced 20 inches, the tennis ball bounced. changing air density, temperature. Our dependent variable was. B) Using the conservation of energy, find the velocity of the ball before it hits the ground from a height of three metres. ball bounced 6 inches. About a foot above the table top is plenty. If the elastic potential energy is the same then the same amount of energy is converted back into KE and so the balls leave the floor at the same speed. It is also good to calculate the coefficient of restitution of your ball using the formula CoR = v/v = sqrt(h/h). Specifically, you are tasked to determine: B.) (The upward direction was assumed to be positive in this example. Gravitational potential energy means energy that an object has based on where it is located in a gravitational field. Physics Ia on Bouncing Ball Also the ball flattening upon impact doesnt have to be taken into account whereas if one was measuring from the top of the ball as it hits the floor to the top of the ball before dropping it or at the top of its arc after bouncing or the middle of the ball as it hits the ground to the middle of the ball before dropping it or the middle of the ball at the top of its bounce then the fact that the ball flattens momentarily on impact with the floor would have to be taken into account. Choose one of the variables you listed in #4, and design an experiment to test it. Temperature will not affect the balls bounce either as the experiment will be conducted at room temperature, thus not allowing the floor to get cold and in doing so alter its affect upon the ball on impact. Being precise as the we drop the ball from a very big height the ball will bounce back at a very big height by Newton's A) Find the total distance of travel until the ball hits the ground for the 5th time.
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