Laboratory 5-Drag Objectives Numerically analyze experimental data to make an ac
ID: 3281246 • Letter: L
Question
Laboratory 5-Drag Objectives Numerically analyze experimental data to make an accurate prediction Equipment Coffee filters, stopwatch, giant tape measure, metre stick Introduction Suppose you wanted to know how long it would take for a plastic army man with a from the top of the Grand it? parachute to fall Hotel downtown without actually doing it. How would you go about doing In this experiment you will be predicting how long it will take for some number of coffee filters to fall down the stairwell in the science building from the second floor. Your TA will let you all many coffee filters will be dropped (somewhere between 1 and 9) I know how Theory Drag is a force that an object feels when it is moving relative to a fluid and is in contact with that f Since we will be dealing with a viscous drag in this experiment, the equation for the magnitude of our drag force will be where b is the drag constant which depends on the shape of the object and the properties of the fluid and v is the speed of the object. You will not be solving the exact physics for this problem (it's hard but you will instead be making predictions based on the data that you collect in a limited environment Procedure & Analysis Your TA will give you three paper coffee filters. Using stopwatches and metre stick, you make measurements so that you can predict how long it would take for those filters to fall down the main stairwell in the Science building. After making your predictions, you will measure how long it actualy takes to fall that distance. How do your results compare to your predicted values? Make sure you are dropping the filters with the flat end on the bottom and the open end on the top. What factors could be affecting the times and what can you do to eliminate these factors? Extra credit will be awarded to the team who makes the most accurate prediction. 65Explanation / Answer
Experimental Method
1. Take one filter and let it fall from main stairwell. Start the stopwatch at the instant the filter is dropped.
2. As the filter hits the ground, stop the stopwatch.
3. Note the start time and the stop time in a table.
4. Calculate the time difference.
5. Measure the distance from the point of drop to the ground. This distance should remain same for subsequent readings.
6. Repeat the process.
Calculations :
Time taken by the filter to fall = time difference
Distance = Measured using the meter stick
Using these velocity can be calculated as
Velocity= Distance / Time taken
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