AP 1: Popper Elastic Constant Lab (Student) v1.1 20140809.docx



Marble Launcher Lab AP Physics 1 – EnergyName______________________Date__________ Period_______All answers and data must follow the Lab Report Format below. Each member is responsible for their own lab report. Objective:Find the elastic constant (k) of the marble launcher using an energy (as opposed to a kinematics) approach.Description/Background:In this lab, you are going to use a marble launcher to launch an object into the air at a 90? angle. You must first pull the handle of the launcher down, which will give the system EPE, and when you release it, the EPE will be converted into KE, giving the object an initial velocity (v). When the marble reaches the top of its trajectory (h); all of the KE is converted into GPE. Hypothesis:When the spring is compressed, it stores energy elastically. You are going to test whether a spring’s EPE=12kx2, where k is the spring constant of the spring, and x is the displacement of the spring from its rest position.ObjectiveA typed complete lab report must include:The materials you used and how you used themThe design of your experiment (this must be an approach to how you go about answering the objective)Data collected in tabular form Analysis of the dataA derivation of how you find the elastic constant from measured quantities (you must test the marble using each notch on the launcher.)A conclusion: summarizing your results assessing any sources errors that may have affected your datadiscussing how you might improve the experiment and / or describing what further experiments you might like to perform on this subjectIn the launcher lab, you did work pulling down on a spring to launch a small object straight up. What are the three forms of energy explored in this lab?How does the energy change form as the object is launched, goes up, then down to the point just before hitting the floor?A spring is used to launch a 0.02 kg marble straight up. The following data table shows the maximum height the marble achieves as the amount the spring is depressed (x) is changed. Answer the following questions after completing the table?x (m)h (m)m (kg)GPE (J)KE (J)v (m/s)EPE (J)k (N/m)0.010.50.020.022.10.034.7What is the maximum GPE achieved by the marble for each value of x?What is the maximum KE of the marble?What is the maximum velocity of the marble?What is the EPE stored in the spring for each value of x?What is the spring constant k for each value of x?Is the spring constant the same for all values of x? YES or NOIf not, give at least 2 reasons for the discrepancy in k. ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download