Project 3 - Bouncing Energy Lab Report

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Southern New Hampshire University *

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Physics

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Dec 6, 2023

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If you need help with any of the sections on this lab report, please refer to the Project Resources Document . If you do not have the materials to complete this experiment, please contact your instructor. Project 3: Bouncing Energy Name: Aidan Welchman EXPERIMENTAL QUESTION: Does increasing the drop height of a bouncy ball affect the amount of energy transferred to surroundings after bouncing? Independent Variable: The height of which the bouncy ball is dropped Dependent Variable: The energy that will be transferred. Constants: bouncy ball weight, gravity HYPOTHESIS – 10 pts Think back to your hypothesis from the pre-lab quiz. Restate your hypothesis here and be sure to read feedback that may have been left from your instructor. Remember to use an “If……, then…….” statement. Remember: You can get the hypothesis from the “Pre-Lab Quiz”. If the drop height of the bouncy ball increases, then the energy transferred to its surroundings will also increase. MATERIALS – 5 pts List the materials used in your experiment . 1 tennis ball, A scale to measure the total mass of the tennis ball, a tape measure, masking tape, a marker

PROCEDURE – 5 pts Make a numbered, step by step list of short instructions describing how the experiment was performed. The procedure should have enough detail so that another person could follow and repeat the experiment. 1) On the wall, using the masking tape, mark 25cm, 50cm, 75cm, 100cm and 125cm. 2) Use the scale to measure the mass of the ball. Record the mass in kg in Table 1 your lab report 3) Hold the ball at the 25cm mark and then simply let go of the ball. Do not throw the ball. 4) Allow the ball to bounce one time and record the approximate height that it reaches. 5) Repeat steps 3 and 4 for a total of three trials for the first ball. 6) Repeat steps 3 through 5 until you have collected data for all of the drop heights marked on the wall in step 1. RESULTS: Data Tables & Calculations – 15 pts Mass of Ball: .057 kg Data Table A: Bounce Height Bounce Height Drop Height (cm) Trial 1 Trial 2 Trial 3 Average Bounce Height (cm) 25 16.31 16.7 18.08 17.03 50 29.48 27.99 27.95 28.47 75 37.50 36.25 36.88 36.88 100 50.81 52.10 53.37 52.09 125 68.98 71.69 68.61 69.76 Calculations Table A: Difference between Drop Height and Bounce Height

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

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