Question

Required (hand in) 1. By using a 2-meter stick (like the one in lab) marked in millimeters and a stopwatch that measures to 1/100h of a second, you decide to measure the speed of a motorized toy car that travels at a constant velocity. You measure out a 162.0cm interval with the 2-meter stick and time how long it takes the car to travel that distance using the stopwatch. Repeating the experiment 5 times you get the following time data: 3.15 s 2.84 s 2.97 s 2.95 s Calculate the average speed of the toy car What are the absolute and relative uncertainties of the distance and time measurements? Which measurement is more uncertain? Use the weakest link rule to determine the relative and absolute uncertainty in your speed estimation. Explain why it is necessary to calculate relative uncertainties. Why is absolute uncertainty not 3.11 s P/F Rubric Item Clarity Criteria for adequate performance Student explains what he/she is doing and why. Explanation is clear, sufficiently detailed, easy to follow, and shows Mathematical procedure is fully consistent with the problem Is able to choose and apply a productive mathematical procedure description. Procedure is free of major conceptual errors. for solving the problem (D7) Is able to identify and quantify sources All experimental uncertainties are correctly identified and of experimental uncertainty (G1 Is able to evaluate specifically how The experimental uncertainty of the final result is correctly identified experimental uncertainties evaluated using the weakest link rule may affect the data/calculation (G2) Final answer is ified

Answer 1

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