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Lab 4: Acceleration Due to Gravity

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Acceleration Due to Gravity Name: Group Members (if any): This lab entails collecting data by measuring the height from which the object will be dropped and accurately recordin release until it hits the floor. This lab focuses on collecting accurate data in order to calculate the value for acceleratio accepted value for acceleration due to gravity, g = 9.8 m/s^2. Students will select three heights that differ by more than minimum height will be 1.0 meters. Students will record five times for each drop height and find the average time. The height will be used to calculate the value for gravity. The student will then calculate the percent error of the value calcu value for acceleration due to gravity. Using the following equation of motion: where s is the height, v0 is the initial velocity of the obje the acceleration. Since gravity is an acceleration, not a force, substituting g for a provides a mathematical equation for for acceleration due to gravity. A dropped object has an initial velocity equal to zero. This fact simplifies the equation t Solve the equation for g below to determine the variables needed to calculate a value for acceleration due to gravity. g=? Outcomes: 1. The student will cacluate an experimental value for acceleration due to gravity. 2. The student will compare the calculated value to the accepted value for acceleration due to gravity. 3. The student will calculate the percent error of the experimental value compared to the accepted value. Materials: 1 1 1 1 Ball Stop Watch that can measure less than one second. Recommended: Use timer on your computer or cell pho Tape Measure Phone or camera to take a photo of your setup Safety Points: 1. Small parts are involved, keep them from small children or animals. 2. Don’t leave materials scattered on the floor, trip hazard. 3. Be aware of your surroundings, make sure the space is clear for the ball to bounce. Procedure: Measure the time it takes for a ball to drop from three different heights. Take five time trials and find the average time. Place you provided. SHOW CALCULATIONS. You must also take a selfie of you with your setup to make the measurements. Your face m picture. Insert it at the end of the lab. Data & Calculations: Height: Trial #1: Trial #2: Trial #3: Trial #4: Trial #5: Sample average calculation 1m sec sec sec sec sec Height: Trial #1: Trial #2: Trial #3: Trial #4: Trial #5: m sec sec sec sec sec Average Time: __________ sec Average Time: __________ sec Compute the value for g at each height. Show your calculations below. Height: 1m Height: m NOTE: THE CALCULATED VALUES FOR g MUST FALL BETWEEN 8.6 m/sec^2 and 11.0 m/sec^2. IF THE CALCULATED Compute the Error and % Error for each calcuated Error = difference between accepted value and % Error = Height: % Error: 1m Height: % Error: Analysis: 1. Which measurement was the most inacurate? Time or Distance? m Explain. 2. Which measurement height gave you the most inaccurate value for g? Explain. 3. Briefly describe the importance of collecing accurate data. Use your experience in the lab by stating the number of trials you r 4. Add your selfie below. pped and accurately recording the time from late the value for acceleration due to gravity. The ights that differ by more than ½ meter. The nd find the average time. The average time for each ercent error of the value calculated to the accepted the initial velocity of the object, t is the time, a is s a mathematical equation for calculating the value fact simplifies the equation to: s=1/2 gt^2. acceleration due to gravity. avity. d value. er on your computer or cell phone. ind the average time. Place your data in the space he measurements. Your face must be visible in the Height: Trial #1: Trial #2: Trial #3: Trial #4: Trial #5: m sec sec sec sec sec Average Time: __________ sec Height: m m/sec^2. IF THE CALCULATED VALUES FOR g DO ween accepted value and Sample % error calculation Height: m % Error: tating the number of trials you required to calculate
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