I need help with these questions please: 13

When you release an object near the surface of the Earth, it falls. In the absence of air resistance, the object, regardless of mass, will fall downward with an acceleration of 9.8 mfsz. In this assignment, you must carry out an investigation into the non-uniform motion experienced by two falling objects. For any investigation, there is a specific method to follow, often called the Scientific Method. It divides an investigation into seven parts: Purpose: What do we want to accomplish in this investigation? Hypothesis: What do we think will happen? What do we predict the result to be? Materials: What apparatus will we use to complete this investigation? Procedure: What method will we follow in order to test our hypothesis? Observations: What did we observe during the investigation? Analysis: What can we deduce from our observations? Conclusion: Was our hypothesis correct? What did we discover by doing this investigation? For this investigation, you will be prompted for each part, and even given some ofthe wording. In this task, anything in italics must be answered or completed; anything in regular type can be copied directly. As the course continues and we do more investigations, you will be expected to complete more and more of the process on your own. Check with your teacher ifyou have any questions. Purpose: The purpose of this investigation is to observe a falling object, a car falling off a cliff, to determine its acceleration, and compare that value to the accepted value of gravitational acceleration here on Earth. Hypothesis: The accepted value of gravitational acceleration on Earth is 9.8 mils? [down]. What do you think the acceleration of the car will be? Why do you think it will be that? Materials: For this investigation, you will collect data from a simulation. No other materials are needed. dwt 1-10 120 100 v tiEI 2|] 1 2 3 it 5 E; ':" tlSl Observations: Create a table of values for time (t) in seconds and position (a?) in metres. Analysis: 1)Construct a positiontime graph using your data. Remember that a good graph has a clear title and clearly labeled axes (with quantity being measured and unit of measurement). a)According to your positiontime 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. 1.Construct a velocitytime 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 mis-2 [down]. Determine the percentage deviation of your value of acceleratior, using the following formula: % deviation 2 [(measured value - accepted value) I accepted valJe] x 100% 3.lf the value is not 9.8 ms2 [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 nonuniform motion? How do you know? What value of acceleration did you nd? What was the percent deviation? Was your hypothesis valid? Why might the value of acceleration be different than the accepted value of 9.8 mfs3 [down]?l