A) Using the graph above, find the displacement of the ball at 50 seconds. For a dropped ball, the total mechanical energy is defined as the sum of its kinetic energy and its gravitational potential energy. You may need to calculate the average of bounce height. We felt the magic immediately. WebControlled Variables: Bouncy ball used, surface bounced off of, technique in which ball was dropped (initial height was measured from base of ball). For an experiment to give answers you can trust, it must have a control. A control is an additional experimental trial or run. So, we equate the potential energy and the kinetic energy. This help to greatly increase the accuracy of the experiment. experiment What factors affect the bounce of a dropped ball? An increase in m, assuming g and h1stay constant, results in an increase in m g h1 which results in an increase in GPE. 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). If you are new in doing science project, click on How to Start in the main page. Use a racquetball, a golf ball or any kind that bounces well and makes a nice crisp sound when it bounces. Kinetic energy is energy of motion. Factors affecting ball bounce 3. This therefore provides accurate and reliable results. The results of our experiment show that this probably is not the case. stay constant, results in an increase in m g h, stay constant, results in a decrease in m g h, The surface onto which the ball is dropped will affect the height to which the ball bounces because for any two objects that collide, the properties of both determine the percentage of the kinetic energy either possesses approaching the collision that is conserved subsequent to the collision taking place (Coefficient to restitution) discounting the effects of air resistance. Using the geometric sequence formula, the sum of the terms which are the heights of the ball after each bound: \(S_n = \frac{\alpha(1-r^n)}{1-r} = \frac{6m(1-0.38^5)}{1-0.38} = 9.6 m\). My hypothesis is based on my observation of balls that are not well inflated. The same square of tiling will be used throughout the experiment so that inconsistencies between different floor tiles do not affect results. WebWhat is a control? Why if you drop a ball from say 2 meters does it bounce higher than a ball dropped from 1 meter? The controlled variables in this experiment are the surface the ball is rolling on, the material the ball is made of, the size of the ball, the measuring devices being used, the distance the ball travels, and the method being used to release the ball each time, for example the position of the hand. The higher the height from which the ball was dropped from, the higher the height to which it bounced. The bounce of a dropped ball has a direct relation with the release height. Sometimes the designer of an experiment can miss the obvious. 1. A control is the variable that is not changed in the experiment. Averages are more reliable than using one result as they take into account variation between results. It tells us that the ball consistently bounced to half of its drop height. An average will then be taken. The selection of balls for official games in most sports (esp. This slope tells us how bouncy the ball is. This is impossible. This will be called the average of the middle three repeats. Writing Quality. 1. GPE also changes as the ball falls. This means that the higher h. will differ from the height that the ball would have reached had it been dropped in a vacuum. Perform this test in a Gym or anywhere else where you have a hard surface and an accessible wall. The formula for kinetic energy is KE=1/2 mv 2 , where m is the mass in kg and v is the velocity in m/sec 2 . Try to find more information from physics or mechanics books. = The distance between the bottom of the ball before it is dropped and the ground. At that instant, how does the ball know how high it should bounce? CoR = coefficient of restitution = (speed after collision)/(speed before collision). You will be able to precisely measure the time intervals between bounces. B (81%) Synonyms. They identify variables to be changed, measured and controlled. For an infinite number of turns, another geometric sequence formula can be used. StudySmarter is commited to creating, free, high quality explainations, opening education to all. The bouncing ball example is an example used to study, A bouncing ball in an ideal scenario will continue this oscillatory motion.
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