Gravity realised

2 December 2024. 

source

The aim is to teach orbiting and how gravity is linked.  There's no aim to mention spacetime.

This is stage 1.  Stage 2 to follow with the theory.

1. Watch the video for less than a minute here.  The sound quality is poor.  Rather, we are looking at the apparatus in terms of its reproduction.
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3. The size is decided by transportability.
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5.  Essentially, it is a trampoline here fitted with so-called four-way stretch Lycra.  An array is here.  The purchase is here.
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7. The frame is all we want.  
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12. Once it is being moved, one sees that it is difficult to manhandle.
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19. Pupils are unpredictable at times and some may lean on this kit.
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21. You note that the legs have been made longer.  More difficult to move.  Luckily, the originals unscrew.
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24. We can now drape the Lycra.
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33. Too early to trim.
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35. MAKING THE BASE
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37. Even before the legs were extended, the outfit was wobbly.  First thought was buy another trampoline and just use the top upsidedown.
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39. But that takes us back to transportability.  Cost is important and is not the only criterion.  However, the second frame and the Lycra take us up to over £90.
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41. Looked for say 40 cm lengths of  22 cm bore curved copper tube.  Started here to no avail.
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43. If successful, would need 6 or so T joints and then add 6 by 60 cm tube for the legs.
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45. Assuming a new base has been made and it's much lighter, it would make sense to make a new top identical to this base.  The legs would need to fit easily but not fall out when the double unit is  carried in two halves.

 

 

 

 

Einstein said.  Hard cone here.