The Laboratory Home || Unit Schedules || The Laboratory || Google Drive || Online Textbook  WebAssign || Minds On Physics || Physics Interactives || The Physics Classroom All lab work should be completed in your course notebook and be recorded on the right side of the open notebook. If you come to the end of the page, you must of course turn the page over and continue writing on the back of the page on the right side of the page of the open notebook. Any accompanying sheets must be taped, glued, stapled or somehow attached to the lab notebook; scotch tape is always available in the room. Scoring Rubrics for each lab are available online. These will also be distributed in class a couple days prior to notebook collection. View: Scoring Rubric (not yet ready) Lab M1:  Balloon Toss Lab Question: What variables affect the impact force in a collision and in what manner do they affect the force? Purpose:  To investigate the effect of three variables (mass, collision time, velocity change) upon the impact force in a collision. A complete lab write-up includes a Title, a Purpose, a Data section, a Conclusion and a Post-Lab Questions section.  The Data section should include some observations of the effect of varying mass, collision time and velocity change upon the impact force on a balloon.  The Conclusion should respond to the question raised in the Purpose.  The provided Post-Lab Questions should be completed and taped into your lab notebook. Lab M2: Impulse and Momentum Change Question: What is the experimental evidence for the claim that the impulse is equal to the momentum change? Purpose:  To conduct an impulse-momentum change analysis for a rebounding-style motion in order to acquire strong evidence and reasoning to support the claim that the impulse on an object is equal to the object's momentum change. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include a taped-in printout of the Force-time and velocity-time graphs. The force-time graph should be integrated to determine the impulse (area under curve); this value should be evidence on the graph. The velocity change from the v-t graph should be used to calculate the momentum change; work should be shown and labeled.  If additional trials need to be done in order to provide good evidence in support of the claim, then additional graphs and calculations should be included. The Conclusion/Discussion of Results should make the claim (1 sentence) and use good reasoning to present the evidence that the impulse is equal to the momentum change. A percent difference calculation should be included. Lab M3: Action-Reaction Lab Question: How do the post-explosion momenta of two carts which are propelled away from each other by an identical force compare to each other? Purpose:  To compare the post-explosion momenta of two carts which are propelled away from each other by an identical force. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include a sample sketch of the velocity-time graphs and a table of data, organized in rows and columns in order to describe the results for several trials with carts of varying mass combinations.  Both measured and calculated data should be included.  At least one example calculation should be provided for each type of calculation.  The Conclusion/Discussion should involve a comparison of the post-explosion momenta of the two individual carts.  An error analysis should be conducted and percent differences should be calculated for the various data trials. Lab M4: Before and After Lab Question: What predictive principles might be capable of describing the post-collision results for simple inelastic and elastic collisions? Purpose:  To qualitatively and systematically analyze a several simple collisions in an effort to develop some predictive principles associated with a collision analysis. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include a description (diagrams preferred) of the before- and after-collision momentum of two colliding carts.  Several trials of observations for a systematic method of variable manipulation should be documented;  at least four inelastic and at least two elastic collisions should be tested. The Conclusion/Discussion should reference the data trials in an effort to state some general principles regarding changes in momentum of individual objects and total system momentum.  Words and/or sample numbers should be used in the discussion. Lab M5: Inelastic Collision Analysis Lab Question: What is the evidence that momentum is conserved in an inelastic collision between two carts?  In what manner does the evidence support the law of momentum conservation? Purpose:  To gather convincing evidence that total system momentum is conserved in an inelastic collision between two carts AND to describe how the evidence supports the law of momentum conservation. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include the provided table.  One example calculation should be shown for each type of calculation.  The Conclusion/Discussion should provide a thorough analysis of the results, identifying successful and unsuccessful trials; specific evidence from each trial which indicate success (or lack thereof) should be elaborated upon.  Percent error or percent difference calculations should be performed and a complete error analysis included within the discussion. Lab M6: Sand Balloon Lab Question: How does the total momentum (vector sum) of two objects before a collision compare to the total momentum after the collision? Purpose:  To compare the total momentum of two objects before a collision to the total momentum of the two objects after the collision. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include an organized table of pre- and post-collision velocity and mass values.  Work should be shown for each type of calculation performed. The Conclusion/Discussion should involve a comparison of the pre- and the post-collision momentum of the system of two objects.  An error analysis should be conducted and percent differences should be calculated for the various data trials. Lab M7: Elastic Collision Analysis Lab Question: What is the evidence that momentum is conserved in an elastic collision between two carts?  In what manner does the evidence support the law of momentum conservation? Purpose:  To gather convincing evidence that total system momentum is conserved in an explosion-like impulse between two stationary carts AND to describe how the evidence supports the law of momentum conservation. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include two tables - one for collected data and one for calculated data;  they should be organized in a row column format.  Several data trials should be performed in an effort to accomplish the stated purpose. One example calculation should be shown for each type of calculation.  The Conclusion/Discussion should provide a thorough analysis of the results, identifying successful and unsuccessful trials; specific evidence from each trial which indicate success (or lack thereof) should be elaborated upon.  Percent error or percent difference calculations should be performed and a complete error analysis included within the discussion. Lab M8: What's Cooking? Lab Question: What is the speed of a ball (in miles/hour) fired from a cannon? Purpose:  To determine the speed (in miles/hour) of a tennis ball which is fired from a cannon. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion.  The Data section should include a diagram of the physical setup, with the specific variables being measured represented in the diagram.  Actual data values should be organized in a table with a row-column format. One example calculation should be shown for each type of calculation.  The Conclusion should answer the question posed in the Purpose. Lab M9: Two-Dimensional Collision Lab Question: What is the evidence that momentum is conserved in a two-dimensional collision?  In what manner does the evidence support the law of momentum conservation? Purpose:  To conduct a vector analysis of a two dimensional collision in an effort to gather convincing evidence that the total system momentum is conserved AND to describe how the evidence supports the law of momentum conservation. A complete lab write-up includes a Title, a Purpose, a Data section, and a Conclusion/Discussion of Results.  The Data section should include a sketch of the experimental results as gathered by the carbon paper impressions (collision location, pre-collision landing location and striker and target sphere post-collision landing location).  Actual measurements taken from the large paper should be recorded on your sketch and labeled using the usual conventions (p1, p1', p2', 1, 2, etc.).  A well-organized mathematical analysis should be conducted to show that momentum is conserved (or not conserved) in both the x- and the y-dimensions.  Work should be labeled and follow-able.  The Conclusion should explain how it is known that total system momentum is conserved; it should also include an error analysis. Home || Unit Schedules || The Laboratory || Google Drive || Online Textbook  WebAssign || Minds On Physics || Physics Interactives || The Physics Classroom