O Motion of a Falling Object 3.5 Start 14 Click Start to begin your observations. 31.5 Prepare a distance-time and a speed-time graph for the motion of a falling object. On your 56 speed-time graph, include a calculation of the acceleration as in the previous slide 87.5 Exit Previous 126Observations: Create a table of values for time (t) in seconds and position (d ) in metres. Analysis: 1. Construct a position-time graph using your data. (Hint: Use the spreadsheet from earlier to get started ) Draw the smooth curve of best fit. Remember that a good graph has a clear title and clearly labelled axes (with quantity being measured and unit of measurement). a. According to your position-time graph, what type of motion did the object undergo? b. Use your position-time graph to determine the instantaneous velocity at a time of your choice. Clearly show the procedure and calculation. ( HINT : find the slope of a very small point see this video if you need more help) 1. Construct a velocity-time graph using your data. Draw the line of best fit. Calculate the slope of the line. What does the slope represent? 2. The accepted value of acceleration due to gravity close to the Earth's surface is 9.8 m/2 [down]. Determine the percentage deviation of your value of acceleration, using the following formula: % deviation = [(measured value - accepted value) / accepted value] x 100% 3. If the value is not 9.8 m/2 [down], then there must be other forces at work, apart from gravity. What other forces might be acting on the car as it falls? Justify your thinking. Conclusion: Is a car falling off a cliff an example of uniform motion or non-uniform motion? How do you know? What value of acceleration did you find? What was the percent deviation? Was your hypothesis valid? Why might the value of acceleration be different than the accepted value of 9.8 m/s? [down]