Spike Prime - Mathematical Pendulum - Revision history

Robot at 14:42, 28 February 2020

2020-02-28T14:42:32Z

Robot at 08:40, 23 February 2020

2020-02-23T08:40:58Z

Robot at 08:38, 23 February 2020

2020-02-23T08:38:43Z

Robot at 08:20, 23 February 2020

2020-02-23T08:20:26Z

Robot at 08:11, 23 February 2020

2020-02-23T08:11:04Z

Robot at 07:33, 23 February 2020

2020-02-23T07:33:34Z

Robot at 06:16, 23 February 2020

2020-02-23T06:16:17Z

Robot at 05:57, 23 February 2020

2020-02-23T05:57:16Z

Robot at 00:16, 23 February 2020

2020-02-23T00:16:58Z

Robot at 20:43, 22 February 2020

2020-02-22T20:43:14Z

← Older revision		Revision as of 14:42, 28 February 2020
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		+	<small>(''[[Spike up Prime Interest in Physics\|back to list of projects]]'')</small>
		+
	== Let's begin ==		== Let's begin ==

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 * Modify the program so that it will measure and record the angular velocity during the swing. Measure the velocity for different starting conditions (length, weight, starting angle). Visualize it. Discuss what has happened.
-* Modify the model so that ...
+* Modify the model so that it could handle even longer pendulum arm.
 == Present ==

@@ Line 54: / Line 54: @@
 == Measure, analyze, think ==
-<youtube width="450" height="800">22uleirJ8f0</youtube>
+<youtube width="350" height="700">22uleirJ8f0</youtube>
 Read the video description for details of our measurement!

@@ Line 14: / Line 14: @@
 [[Image:spike_pendulum_model.png|model of pendulum|700px]]
-The model contains some parts from the extension set such as the large wheels. They are not essential, you can use your creativity and use other parts to raise the bottom of the model and to balance it with a weight on the back, if you only have the basic Spike Prime set.
+The model contains some parts from the extension set such as the large wheels. They are not essential, you can use your creativity and use other parts to raise the bottom of the model and to balance it with a weight on the back, if you have the basic Spike Prime set only.
 Hint: if you do not have enough time to build this model, you can still perform the experiment: just attach the pendulum using a simple axle as shown in the last picture, it will work the same.

@@ Line 1: / Line 1: @@
 == Let's begin ==
-introduction...
+Have you been to a museum of clocks? In Bratislava, we have one, remember to [https://www.visitbratislava.com/places/museum-of-clocks-house-at-the-good-shepherd/ stop by] at your next visit to Bratislava! :-)
 == Build ==
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 [[Image:spike_pendulum_model.png|model of pendulum|700px]]
 Pictures:
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 [[Image:spike_pendulum_7_weight_of_light.jpg|weight of light|300px]]
 [[Image:spike_pendulum_8_weight_of_heavy.jpg|weight of heavy|300px]]
 Building instructions:
@@ Line 39: / Line 49: @@
 Download: [[Media:pendulum.llsp|pendulum.llsp]]
-description of the program
+The program gives the user a short time in the beginning to make sure that the pendulum is in a proper starting position. It visualizes this waiting stage on the display and with a sound. The pendulum should be started from the left side. The program then waits until it will swing to the right for the first time, and then it starts looking at the pitch value of the gyroscope, which oscillates between -90 and 90, and it is 0 when stopped and freely hanging. The program observes the changes of the pitch value and indicates the current direction of the swing on the display. At the same time, it is measuring the maximum angular displacement in both directions. It is also calculating the swing time of a complete cycle, a period. The maximum angular displacements and the periods are stored into the array so that they can later be processed on the computer - for instance visualized in a spreadsheet program.
@@ Line 47: / Line 56: @@
 <youtube width="450" height="800">22uleirJ8f0</youtube>
-* Make your own recording
+Read the video description for details of our measurement!
 Example result of measurement (x: the number of oscillations, y: seconds (duration of 1 oscillation = period) in the first chart and maximum angle in degrees in each oscillation in the second chart)
@@ Line 56: / Line 65: @@
 Download: [[Media:spike_pendulum_experiment.zip|experiment.zip]] - recorded data from all 8 combinations as seen in video
-* Perform measurements with your model and discuss in your group what has happened.
+* What can you see in the charts?
-* How to export variables from your Spike Prime program?
+How to export variables from your Spike Prime program?
 <youtube>oIyN_EZNsQQ</youtube>
 == Explore and modify ==
-* Modify the program so that ...
+* Modify the program so that it will measure and record the angular velocity during the swing. Measure the velocity for different starting conditions (length, weight, starting angle). Visualize it. Discuss what has happened.
 * Modify the model so that ...
@@ Line 75: / Line 94: @@
 == Additional resources ==
-* Download: [http://robotika.sk/spike/spike_physics_7_pendulum.zip Pendulum - all media files]
+* Download: [http://robotika.sk/spike/spike_physics_8_pendulum.zip Pendulum - all media files]
 __notoc__

@@ Line 49: / Line 49: @@
 * Make your own recording
-Example result of measurement:
+Example result of measurement (x: the number of oscillations, y: seconds (duration of 1 oscillation = period) in the first chart and maximum angle in degrees in each oscillation in the second chart)
 [[Image:pendulum_periods_chart.png|periods for all 8 combinations]]