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#Acceleration due to gravity lab report discussion softwareThe first graph yields a curve which may be conveniently evaluated using a software curve-fitting tool.Two examples are described here a straightforward plot of the collected data, velocity against height, and a second plot involving calculated data. Software provides several alternative approaches to analysis.The software usually facilitates the deletion or hiding of such values. The chart also makes it very easy to spot anomalous results due to the card wobbling or snagging on the ruler as it falls. The visual display of results on a bar chart helps to show the significance of these variations, compared with overall trends in the relationship between velocity and height. For example, how clean was the release of the card, how precise was the height measurement, was the fall wobble-free? and so on. Small variations between individual results should be observed and possible sources of error discussed.If you do this as a class experiment, students should be prompted to ask questions about the results and the process involved in collecting them. You can orchestrate discussion as the experiment proceeds. ![]() These can be used to prompt students' thinking. One of the chief values of real-time data-logging, exemplified here, is the interaction between the collection and simultaneous display of results.A straight line is the usual result, showing that the velocity squared is proportional to the height fallen. Use the program to calculate a new column of data representing the square of the velocity.This is usually of the form 'velocity is proportional to the square root of height'. (Y axis: velocity X axis: height fallen.) Use a curve matching tool to identify the algebraic form of the relationship. The relationship between velocity and height fallen is more precisely investigated by plotting a XY graph of these two quantities. ![]() Note the relative increase in values of velocity as greater heights are chosen.
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