![]() ![]() Furthermore, the experimental range was shown to be larger than the calculated range, and if wind resistance would have contributed, it would be logical to assume that the ball would have landed shorter than expected. Additionally, the location of the launch was not directly in the line of the air conditioning unit, which would have contributed to the bulk of the wind resistance. ![]() I do not think that wind resistance could be a factor because the steel ball is heavy enough that it would not be affected notably. Initial Velocity- Slight misalignments in the Photo Gates could cause small variations in the velocity measurement.Īngle- Parallax error could also occur in the angle measurement. Sources of error for the measurements are as follows:Ĭhange in Y- Parallax error, meaning "a change in position of an object resulting in a change in position of the observer," may have contributed to a position measurement slightly above or below the true position of the bottom of the ball within the launcher. The measured range was larger than the calculated range.īecause the average range was about 2 cm away from the predicted measurement, the uncertainly for the range calculation can be said to be roughly ± 2 cm. Explain why it would work this way.The purpose of this lab was to predict the range of a projectile object, and we were able to do so with only a 0.811% difference between the calculated range and the experimental range of the projectile. Through these measurements and an understanding of projectile motion. One of the easiest ways to deal with 2D projectile motion is to just analyze the motion in each direction separately. You will use two different experimental methods to determine the initial speed of the ball: measuring the maximum height that the ball reaches and measuring the total time that the ball spends in the air. 3.A.1.3: The student is able to analyze experimental data describing the motion of an object. In this lab, you will use a spring-powered projectile launcher to fire a small metal ball upward. Propose a source of error that could have caused his calculated height to be lower than his measured height. In this lab, we will measure the horizontal distance which a projectile travels. AP Physics Lab 3: Horizontal Projectile Motion (Big Idea 3). The actual height of his measured object is 2.8m. The physical quantities that will be calculated based on those measurements include speed, horizontal motion, vertical motion, and overall velocity. The measured physical quantities that are measured in this experiment include length (meter) and time (second/s). He calculates the height of his object to be 2.2m. The purpose of this experiment is to describe projectile motion. Calculate the height of the object and the launch velocity (speed and angle) of your projectile.Ī student sets up his camera to record the motion of his projectile. Show the calculations for your small scale test and your full scale test. Include the data from your small scale test. Include the quantity measured, the symbol you will use to denote the quantity, and the measurement tool used to take the measurement. Include the procedures needed to determine your percent error.Ĭreate a data table where you will record the measurements from your experiment. ![]() Include, also, a description of how the launch velocity of the projectile can be determined.ĭerive an equation that could be used to calculate the launch velocity of the tennis ball with data that can be measured in our laboratory.ĭerive an equation that could be used to calculate the maximum height achieved by the tennis ball during its trajectory.ĭescribe the procedures you used in enough detail that another lab team could follow them and achieve the same results. Purpose: To use the projectile motion of a tennis ball to calculate the height of an object that is too tall to be measured with our metersticks.ĭescribe the physics principle(s) that make it possible for a tall object's height to be calculated from the motion of a bounced tennis ball. ![]()
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