Spike Prime - Center of Gravity - Revision history

Robot at 14:41, 28 February 2020

2020-02-28T14:41:23Z

Robot at 10:57, 13 February 2020

2020-02-13T10:57:06Z

Robot at 10:40, 13 February 2020

2020-02-13T10:40:57Z

Robot at 10:39, 13 February 2020

2020-02-13T10:39:18Z

Robot at 10:36, 13 February 2020

2020-02-13T10:36:32Z

Robot at 10:35, 13 February 2020

2020-02-13T10:35:23Z

Robot at 10:33, 13 February 2020

2020-02-13T10:33:52Z

Robot at 10:22, 13 February 2020

2020-02-13T10:22:22Z

Robot at 10:14, 13 February 2020

2020-02-13T10:14:47Z

Robot at 09:42, 13 February 2020

2020-02-13T09:42:48Z

← Older revision		Revision as of 14:41, 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 ==

@@ Line 74: / Line 74: @@
 == Additional resources ==
-* Download: [http://robotika.sk/spike/spike_physics_2_average_speed.zip Average speed - all media files]
+* Download: [http://robotika.sk/spike/spike_physics_4_center_of_gravity.zip Center of Gravity - all media files]
 __notoc__

@@ Line 39: / Line 39: @@
 Building instructions:
-* [[Spike Prime - Center of Gravity|Center of Gravity (PNG)]]
+* [[Spike Prime - Center of Gravity - Building Instructions|Center of Gravity (PNG)]]
 Download building instructions:

← Older revision		Revision as of 10:39, 13 February 2020
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	* Try attaching also different objects so that the center of gravity will change. Now try to estimate its position by guessing first, then verify your guess by a measurement.		* Try attaching also different objects so that the center of gravity will change. Now try to estimate its position by guessing first, then verify your guess by a measurement.
		+

	== Present ==		== Present ==

@@ Line 20: / Line 20: @@
 [[Image:spike_gravity_2_cut_paper.jpg|cut paper|300px]]
-Build this little piece that will hold the plate on the stand from the back of the paper, the axel will protrude to the front for hanging a longer technic beam. This piece weighs less than 2 grams, thus it will have only a very little influence on the result.
+Build this little piece that will hold the plate on the stand from the back of the paper, the axel will protrude to the front for hanging a longer technic beam. This piece weighs less than 2 grams, thus it will have only a very little influence on the result. Use a longer axle if needed.
 [[Image:spike_gravity_3_build_little_piece.jpg|build little piece|300px]]

← Older revision		Revision as of 10:35, 13 February 2020
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	== Let's begin ==		== Let's begin ==

−	When we look at any object from aside, there exists a very special point. If the object would be fixed to that point (if possible somehow), and set to rotation, it would keep freely ~~rotating~~ around it infinitely (except of friction of course). Sometimes (as we will see in the next exercise), it is very useful to know where this point is. In this exercise we will try to find it.	+	When we look at any object from aside, there exists one very special point. If the object would be fixed to that point (if possible somehow), and set to rotation, it would keep rotating freely around it infinitely (except of friction, of course). Sometimes, as we will see in the next exercise, it is very useful to know where this point is. In this exercise we will try to find it.

@@ Line 1: / Line 1: @@
 == Let's begin ==
-introduction...
+When we look at any object from aside, there exists a very special point. If the object would be fixed to that point (if possible somehow), and set to rotation, it would keep freely rotating around it infinitely (except of friction of course). Sometimes (as we will see in the next exercise), it is very useful to know where this point is. In this exercise we will try to find it.
 == Build ==
@@ Line 11: / Line 12: @@
 Pictures:
-[[Image:spike_gravity_1_prepare_paper_and_scissors.jpg|vehicle|300px]]
+First prepare some used sheet of paper and scissors:
-[[Image:spike_gravity_2_cut_paper.jpg|vehicle|300px]]
-[[Image:spike_gravity_3_build_little_piece.jpg|vehicle|300px]]
+[[Image:spike_gravity_1_prepare_paper_and_scissors.jpg|prepare paper and scissors|300px]]
-[[Image:spike_gravity_4_have_a_pen_with_suffiently_long_tip.jpg|vehicle|300px]]
-[[Image:spike_gravity_5_attach_some_objects.jpg|vehicle|300px]]
+Cut and attach the paper to the technic plate - either using the connector pegs, or with a tape:
-[[Image:spike_gravity_6_resulting_centers_of_gravity.jpg|vehicle|300px]]
 Building instructions:
@@ Line 24: / Line 43: @@
 Download building instructions:
-* [[Media:spike_measure_center_of_gravity.pdf| stand(pdf)]]
+* [[Media:spike_measure_center_of_gravity.pdf| stand (pdf)]]
 Download stud.io model:
@@ Line 40: / Line 59: @@
 <youtube>bDHmOxN3lEY</youtube>
-* Make your own pictures and recordings
+* Always document your work, make pictures or recordings.
-* Attach different objects so that the center of gravity will change. Try to estimate its position by guessing first, then verify by measurement.
 == Explore and modify ==
-* Modify the program so that ...
+* Try attaching also different objects so that the center of gravity will change. Now try to estimate its position by guessing first, then verify your guess by a measurement.
 == Present ==

@@ Line 38: / Line 38: @@
 == Measure, analyze, think ==
-<youtube>hOc52q9EHwU</youtube>
+<youtube>bDHmOxN3lEY</youtube>
 * Make your own pictures and recordings