Experiment Title



Experiment Title: Bouncy Ball BouncePurpose Question: Which bouncy ball will have the highest first bounce from 100 cm if they are different weights and sizes?Background Research: The weights of the bouncy ballsSmall: 7.5 gramsMedium: 16.4 gramsLarge: 36.2 gramsBouncy balls are made of rubberThe bigger the mass, the more gravity affects objectsHypothesis: What do you predict will happen and why? If we drop large, medium, and small bouncy balls from 100 cm, then the small ball will have the highest first bounce because gravity will pull down the big balls.Materials: Large 36.2 g bouncy ball Medium 16.4 g bouncy ballSmall 7.5g bouncy ballMeter stickScale (in grams)Hard, flat, surfaceMethod/Procedure: (1. 2. 3. etc.)Gather materialsMeasure the small bouncy ball with the scale in gramsRepeat step 2 with the large and medium size bouncy ballsStand up the meter stick vertically on a hard and flat surfaceAlign the small ball with 100 cm on the meter stick and drop the ballRecord the measurement of the bounce in cm.Repeat steps 5 and 6 with the medium and large bouncy ballsRepeat steps 5, 6, and 7 for a total of three trialsData Tables:Mass of Ball (g)Trial 1Trial 2Trial 3Avg.Small 7.5 g66 cm69 cm75 cm70 cmMedium16.4 g75 cm77 cm73 cm75 cmLarge36.29 g80 cm81 cm80 cm80.333 cmGraphs:Experiment Title: Bouncy Ball BounceConclusion1. What problem/question are you trying to answer by performing this investigation? Does the mass of the bouncy ball effect the height of the bounce?2. Compare your hypothesis to your results. How do the findings of your investigation compare to your hypothesis? Our hypothesis, If we drop large, medium, and small bouncy balls from 100 cm, then the small ball will have the highest first bounce because gravity will pull down the big balls, was wrong and completely the opposite of what happened in the experiment. The smallest ball bounced the lowest and the largest ball bounced the highest.3. Method Evaluation: What sources of error can be found in this lab? What can be done to improve the procedures of this lab to avoid these errors in the future? To improve this lab, we could include in the procedures to drop the ball as close to the meter stick as possible without hitting it, so that the measurement of the first bounce would be more accurate.3. What prediction can be made between the Independent variable and the Dependent variable?The greater the mass of the bouncy ball, the higher the first bounce will be.4. Use the space below to design another investigation related to the previous lab. Include in your investigation a testable question, your hypothesis, the equipment/materials you would need, the data/information you wish to collect and the variables to be you will test. If you wish you can add drawings to your investigation too. Be as detailed as possible and follow scientific methods and procedures.My Question: Does the direction an object is falling affect the amount of time it takes for it to fall?My Hypothesis: If I take two of the same sized balls and drop one and throw the other vertical from the same height, then they will land at the same time because they are both receiving the same gravitational pull.The Procedure and Materials (may include drawing):MaterialsTwo balls of the same sizeTwo stopwatchesProcedure Gather materialsHave one person drop a ball straight down Have another person throw a ball in a different direction at the same height and same exact time.Have two other people time how much time it takes each ball to hit the ground’Record dataVariables Tested:Height of ball vs. time ball takes to hit the groundData I will collect:Time ball took to hit the ground related to the height the ball was dropped from. ................
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