Project 3 - Bouncing Energy Lab Report

Drop Height (cm) — Average Bounce Height (cm) = Difference Between Drop Height and Bounce Height (cm) ÷ Convert cm to meters Difference Between Drop Height and Bounce Height (meters) 25 — 17.03 = 7.97 ÷ 100 .0797 50 — 28.47 = 21.53 ÷ 100 .2153 75 — 36.88 = 38.12 ÷ 100 .3812 100 — 52.09 = 47.91 ÷ 100 .4791 125 — 69.76 = 55..24 ÷ 100 .5524 You will need to perform calculations to determine how much energy is transferred by the ball on each surface. Use the following formula to calculate how much energy each ball transfers in this experiment: Gravitational Potential Energy (J) = mass (kg) x acceleration due to gravity x height (meters) Note: ● Mass (kg): take from “Mass of Ball (kg)” for each ball in Table 1. ● Acceleration due to gravity: 9.8 m/s 2 near Earth. ● height (meters): take from “Average Height (meters)” for each ball in Data Table Calculations Table B: Amount of Potential Energy Transferred to Surroundings Mass of Ball (kg) X Acceleration Due to Gravity X Difference Between Drop Height and Bounce Height (meters) = Amount of Potential Energy Transferred to Surroundings (J) .057 kg X 9.8 m/s 2 X .0797 = .04452 .057 kg X 9.8 m/s 2 X .2153 = .1203 .057 kg X 9.8 m/s 2 X .3812 = .2129 .057 kg X 9.8 m/s 2 X .4791 = .2676 .057 kg X 9.8 m/s 2 X .5524 = .3086

1) I thought it was interesting that the trend from the data table positively increases in a very near linear positive direction on the graph. 2) The evidence makes sense based on the data, but logically it also makes sense that the increase in energy you start with would need to be transferred when it is converted. If you look at the low end data all the way to the high end, then you see a huge difference, but it positively trends for each different height as well. CONCLUSION – 30 pts In your conclusion include the following: 1. Restate the hypothesis and whether it is supported or not. Use data as evidence. For evidence, refer to your data table. (Use complete sentences.) (10 pts) 2. Make inferences to explain your results. Reference the Background section of the Project 3: Bouncing Energy Lab Introduction page. Suggestions: What do you think is causing the results you are seeing? For example, why do you think the ball transferred energy to the surroundings in the way that it did? (5 pts) 3. Review the constants you listed in the pre-lab quiz. List them and describe how they could have influenced the results of this experiment. (5 pts) 4. Make a suggestion for how you could improve this experiment to provide more evidence. How could you manipulate the experimental constants, including but not limited to: the material of the bouncy ball, bounce surface, methods of measurement, etc. (5 pts) 5. Summarize the experiment. Suggestion: discuss the real world applications from the findings of this experiment. (5 pts)