Changes in air pressure could have affected results as could changes in temperature however changes in these two factors would have been small; air pressure would not have changed enough to affect the results in the hour period in which the experiment was conducted, and although the rooms temperature may have increased by a degree or two, due to body heat, over the course of the period temperature was not a major factor that affected the height to which the ball bounced and would not have significantly affected the results. To set up the Finally, we need to multiply the distance found by 2, as one bounce of the ball includes both a rise and fall. The ball rebounds to 38 percent of its previous height and continues to fall. No, the bouncing ball example is not an example of simple harmonic motion. Variables - Working scientifically - KS3 Science - BBC Bitesize Tape the ruler to the wall. Taking an average of several results creates a measurement in the middle of the variation created by the experiment, which is the result that is closest to the height that would be recorded for the balls bounce if it were measured in an experiment that was totally accurate. C) Frozen tennis balls will not bounce as high. What Effects the Bounce of a Dropped Ball It is the most basic kind of energy. Variables Independent variable = drop height Dependent variable = bounce height Controlled variables = ball, surface, measuring tool. The ball showed signs of reaching terminal velocity because the drag force began to approach the force gravity exerts upon the mass of the ball. What Effects the Bounce of a Dropped Ball Dependable controls are sometimes very hard to develop. As velocity increases air resistance increases in proportion to the square of the velocity. Removing the maximum and minimum results and taking an average of the middle three results also provided more accurate results. It is always good to have an explanation for choosing any hypothesis. The positive and negative directions must be stated in each example. It is always important for students, parents and teachers to know a good source for science related equipment and supplies they need for their science activities. It is from calculations using recorded data that tables and graphs are made. The decision for the size of interval and the amount of results collected will depend upon the time taken to conduct the experiment and any other factors that may become apparent during the preliminary experiment. This is a sample on how to write the results, conclusion and make charts. Our dependent variable was. Find the infinite distance of travel. Stages of bouncing ball example, Panagi - StudySmarter Originals, Motion graphs of a bouncing ball, Panagi - StudySmarter Originals.