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
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 ml?. 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: 1. Purpose: What do we want to accomplish in this investigation? 2. Hypothesis: What do we think will happen? What do we predict the result to be? 3. Materials: What apparatus will we use to complete this investigation? 4. Procedure: What method will we follow in order to test our hypothesis? 5. Observations: What did we observe during the investigation? 6. Analysis: What can we deduce from our observations? 7. 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 of the 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 if you 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 m/$2 [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. Procedure: 1. Run the following simulation to review non-uniform motion. 2. Collect the data on the position of the car as it goes off the cliff. The position is measured every second.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 speed-time graph, include a calculation of the 56 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/:? [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/:2 [down]
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