The surface onto which the ball is dropped upon will be kept the same. WebControlled Variables: Bouncy ball used, surface bounced off of, technique in which ball was dropped (initial height was measured from base of ball). Air pressure will affect the balls fall slightly as the concentration of air particles per cubic meter varies with air pressure. This project guide contains information that you need in order to start your project. For instance result 3 from 200cm was an anomaly but was not taken into account when taking the average of the middle three. 8. Read books, magazines or ask professionals who might know in order to find out the factors that affect the movements of a dropped ball. 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. However, the tennis ball we used may be a very old one, and to definitely prove that our hypothesis is wrong for most tennis balls we would need to repeat the experiment with many different tennis balls. An experiment has several types of variables, including a control variable (sometimes called a controlled variable). Writing Quality. This is a sample on how to write the results, conclusion and make charts. My hypothesis is based on my observation of balls that are not well inflated. Bouncing Ball Example: Experiment, Formula, Force, Motion The three trials at each height are then averaged, and the average bounce height is graphed versus the drop height. This means for the ball to reach terminal velocity the drag force has to be bigger and for the drag force to be bigger the ball has to fall faster (so that more air particles hit the ball every second). Also the difference between the force of air resistance acting upon a ball travelling at 1ms, and the force of air resistance acting upon a ball travelling at 2ms, is far smaller than the difference between the force of air resistance acting upon a ball travelling at 20ms, and the force of air resistance acting upon a ball travelling at 21ms, , the faster the velocity that the ball reaches. 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. As the ball has less KE and is travelling slower it becomes stationary faster at the top of its arc. Report DMCA Overview This will help with your understanding of the investigation and lead you to make a possible hypothesis. Design an experiment to test each hypothesis. Hypothesis: If a tennis ball is dropped from a specific height then the ball will bounce to the same height. Therefore the energy that the ball hits the floor with = mh, The proportion of energy lost when ball hits the floor = The Coefficient to the restitution of the two objects (C, All of the energy that the ball leaves the floor with is converted back into GPE, If dropping a ball in a vacuum all you need to know in order to know how high the ball will bounce to is h, can be found out by looking at a graph, the gradient, as a percentage of 1 gives the amount of energy conserved and therefore C. The clamp stand will be clamped down to the desk using a g-clamp to prevent it falling over and causing possible injuries. The reason for our error was that we thought that the tennis ball might be specially made to bounce to the same height. What Is The Control Variable In The Bouncing Ball Experiment? Summary of task. The motion of the ball can be described using velocity, displacement, and acceleration graphs, or geometric sequences. As the ball is falling toward the ground its Kinetic Energy is increasing because its speed is increasing. Averages are more reliable than using one result as they take into account variation between results. You will next need to record your bounces and their respective times. 1. Changes in the area of linoleum floor tile that the ball collided with may have affected the height to which it bounced to thus producing variation between results. You will need an assistant, so one person will drop the ball and the other person stands about 20 feet away and records how high it bounces. 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. \[S_{\infty} = \frac{\alpha(1-r^{\infty})}{1-r} = \frac{\alpha(1-0)}{1-r} \qquad S_{\infty} = \frac{\alpha}{1-r}\]. Controlling Variables Part 1 ( Video ) | Chemistry | CK-12 Foundation This is why it h2will be 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. StudySmarter is commited to creating, free, high quality explainations, opening education to all. For a dropped ball, the total mechanical energy is defined as the sum of its kinetic energy and its gravitational potential energy. Soccer Science Fair Project: Air Pressure & Distance - Education I called School Time and my husband and son came with me for the tour. ThatQuiz Find sections related to potential energy, elasticity and springs. The ball rebounds to 72 percent of its previous height and continues to fall. WebControl variables include the size of pots, the type of soil and the position in a room. Then when dropping the ball again eye level will be kept level with the blue tack thus avoiding parallax errors. Additionally we were able to practice reading a lab, taking data and making a graph. At this level, science becomes even more interesting and powerful.8. A totally accurate experiment would have a variation between results equal to zero however an experiment that is totally accurate needs to be conducted under conditions where air pressure and temperature remained constant, error produced by the ball falling on different parts of the linoleum floor tile (which was not totally even and thus produces inaccurate results) and human error removed by dropping the ball onto a uniform surface and using machinery to record the height to which the ball bounced to.
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